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HISTORY.txt
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---------------------------------------------------------------------------------------------------------
Genesis Plus GX 1.7.5 (xx/xx/xxxx) (Eke-Eke)
---------------------------------------------------------------------------------------------------------
[Core/Misc]
---------------
* added optional dynamic allocation of cartridge/CD hardware buffer (for platforms with BSS size limitation)
* improved frame emulation timing, now starts with vertical blanking to reduce input lag by one more frame
(!!!warning: this breaks compatibility with previous savestates!!!)
* various code cleanup
[Core/CD]
---------------
* added CD-AUDIO & CD+G support
* added CD-ROM Mode 2 (Form 1 & 2) support (Wonder Library)
* added optional support for external VORBIS library
* added optional CHD file support
* added CDC & GFX register polling detection / synchronization
* improved Timer interrupt timings and CDD interrupt accuracy (fixes audio stutters during Popful Mail FMV)
* improved CDC emulation (fixes random freezes during Jeopardy & ESPN Sunday Night NFL intro)
* improved emulation of mirrored memory areas
* improved savestate format
* improved Sub-CPU synchronization with Main-CPU (fixes "Soul Star")
* improved Main-CPU & Sub-CPU idle loop detection (fixes "Super League CD")
* improved PAL Mega CD timing accuracy (fixes PAL "Snatcher" intro synchronization)
* improved CDD "play" command accuracy (fixes "Snatcher" Act 2 starting cutscene)
* improved CDD status report accuracy (fixes track looping with Mode 1 patched games using MSU-MD driver)
* improved Word-RAM byte access accuracy (verified on schematics)
* disabled 68k and Z80 access to PRG-RAM when SUB-CPU is running (fixes "Dungeon Explorer")
* disabled CD hardware reset on Soft-Reset (verified on real hardware)
* fixed potential load issues with non-zero backup RAM cart
* fixed DATA track minimal length (fixes BIOS refusing to boot small homebrew demos)
* fixed CDD "no disc" status code (fixes boot sequence loading time when no disc is loaded)
* fixed AUDIO tracks length calculation when using separated files (WAV/OGG/BIN) with INDEX pause defined in CUE file
* fixed OGG file seeking when using with CUE file
* fixed WAV file detection to support files generated by Audacity/FFmpeg/libavformat with RIFF header metadata chunks
* fixed PRG-RAM access from MAIN-CPU side on system reset
* fixed state loading bug when SUB-CPU interrupt is pending
* fixed incorrect masking of Level 3 (GFX) interrupts (spurious freeze during Japanese BIOS intro)
* fixed H-INT vector handling when using Mode 1
* fixed access to "write-only" communication flags (verified on real hardware by Notaz)
* fixed access to Sub-CPU "read-only" communication registers (fixes Round 5 Boss freeze in Streets of Rage / Sega Classics Arcade Collection)
* fixed pending level 1 interrupts when GFX interrupt is disabled (fixes random freezes when exiting "Batman Returns" option menu)
* fixed CDD seek command again (Final Fight CD freeze with model 2 BIOS)
* fixed CDD status reported during seek/access time (sound effect synchronization issue in Bari Arm)
* fixed word access to CDD control register (fixes spurious audio track playback on startup with Mode 1 patched games using MSU-MD driver)
* fixed CD communication registers state on peripheral reset (fixes SUB-CPU side initialization in MSU-MD sample demo and some Mode 1 patched games using MSU-MD driver)
* optimized Sub-CPU / Main-CPU synchronization
[Core/MD]
---------------
* added support for more Radica dumps
* added support for more X-in-1 pirate mappers
* added support for some new unlicensed games with copy protection (Thunderbolt II, Tom Clown, Chaoji Puke / Super Poker, Rock Heaven, Rock World)
* added support for Everdrive extended SSF mapper
* added (very basic) emulation of Flashkit MD hardware
* added emulation of Micro Machines USA on-board TMSS bypass logic hardware
* improved console region auto-detection for a few PAL-only games (The Smurfs Travel the World & Williams Arcade's Greatest Hits)
* improved I2C EEPROM boards emulation accuracy
* improved SVP memory handlers accuracy (fixes Virtua Racing debug mode)
* fixed Game Genie / Pro Action Replay lock-on support when Mega CD hardware is enabled
* fixed SRAM support in Triple Play 96 & Triple Play - Gold Edition
* fixed automatic CD loading with .md ROM files
* fixed ROM padding for Sonic & Knuckles
* fixed SRAM detection for games where it is mapped to work RAM ("Feng Kuang Tao Hua Yuan" crash)
* fixed 1.7.4 regression with games using SRAM bank-switching
[Core/MS]
---------------
* added new SMS Power dumps in internal database
* added support for new SMS Power dump Jang Pung II (KR)
* added support for Hi-Com X-in-1 mapper (thanks to Bock from SMS Power)
* improved console hardware auto-detection
* improved emulation accuracy of SG-1000 & Mark-III hardware
* improved emulation accuracy of Japanese Master System I/O chip (315-5297)
* fixed Boot ROM loading when switching system hardware
* fixed 4MB ROM support
* fixed savestate support when using Boot ROM
[Core/GG]
---------------
* added optional LCD ghosting software filter
* fixed mirrored access to I/O control register (G-LOC Air Battle)
[Core/SG]
---------------
* added support for new SMS Power Korean dumps (Star Soldier & Pippols)
* added support for SG-1000 II clone hardware (2KB RAM + integrated VDP/PSG chip 315-5066)
* fixed SG-1000 internal RAM size (1KB instead of 2KB)
* fixed savestates for games using external RAM
* restored SG-1000 Pause button support
[Core/CPU]
---------------
* added Z80 wait-states on 68k bus access (fixes Remute Red Eyes demo)
* improved 68k auto-vectored interrupts acknowledge cycle timing accuracy (Bubsy background color corruption during cutscenes)
* fixed 68k undocumented behaviors for ABCD/SBCD/NBCD instructions (thanks to Flamewing for his test ROM)
* fixed 68k timing of BTST Dn,#Imm instruction (verified by Flamewing in original microcode)
* fixed 68k timings of ANDI.L #Imm,Dn, ADDQ.W #Imm,An and TAS instructions (cf. Yacht.txt)
* fixed 68K DIVU instruction timings for SUB-CPU
* fixed Z80 interrupt duration (Bomb on Basic City music running too fast)
* fixed Z80 SP register initialization on power-on for Master System & Game Gear
(Ace of Aces, Shadow Dancer, Ecco the Dolphin, Evander Holyfield Real Deal Boxing)
[Core/IO]
---------------
* added Sega Graphic Board support (thanks to SMS Power)
* added Master Tap emulation (multi-player support in Boom homebrew)
* added gamepad type auto-detection
* added support for XE-1AP controller on both ports
* improved XE-1AP controller emulation
* improved HVC latch behavior for gun emulation (fixes "Gunfight - 3 in 1" randomization when using Justifier)
* improved control pad emulation accuracy (verified on real hardware)
* improved 4 Way-Play emulation (fixes multitap detection in CD games)
* increased Sega Mouse latency (fixes mouse support in Star Blade)
* fixed TeamPlayer emulation (fixes multitap detection in Gauntlet 4)
[Core/VDP]
---------------
* implemented proper FIFO ring-buffer & unused bits behavior on CRAM/VSRAM reads (verified on real hardware by Nemesis)
* improved accuracy of DMA Copy/Fill & added support for CRAM/VSRAM Fill (verified on real hardware by Nemesis)
* improved V28/V30 mode switching during active display (verified on real hardware)
* improved Mode 5 sprites parsing accuracy (verified on real hardware)
* improved Mode 5 sprites rendering timings (fixes "Overdrive" demo)
* improved FIFO timings accuracy (fixes "Overdrive" Demo)
* improved H-Counter accuracy in H32 mode
* improved VDP status timing accuracy
* improved DMA timing accuracy during blanking (verified on real hardware by Mask of Destiny)
* improved accuracy of Master System color palette brightness range (verified against real hardware)
* fixed misaligned buffer writes in Mode 4 when -DALIGN_LONG option is used
* fixed alpha channel for 15-bit (RGB555) and 32-bit (RGB888) color support
* fixed register #10 state on VDP¨reset (fixes GG Terminator 2: Judgment Day)
* fixed Mode 1 rendering (TMS99xx "text" mode)
* fixed Master System II extended video modes sprite parsing (fixes Mega Man 2 demo)
* fixed Game Gear display rendering regression when left/right borders were disabled
* fixed 68k cycles delay on invalid VRAM writes (fixes "Microcosm" intro loop)
* optimized tile caching
[Core/Sound]
---------------
* added DAC distortion emulation for discrete YM2612 chip model
* added accurate status & BUSY flag emulation for discrete and ASIC-integrated YM2612 chip models (verified on real hardware)
* added optional support for cycle-accurate YM3438/YM2612 & YM2413 cores from Nuked
* removed PSG boost noise feature & added optional high-quality PSG resampling
* rewrote optimized & more accurate PSG core from scratch
* replaced configurable YM2612 DAC quantization by configurable YM2612 chip model emulation (discrete, ASIC-integrated or enhanced)
* improved 9-bit DAC quantization accuracy for discrete and ASIC-integrated YM2612 chip models (verified on YM2612 die)
* improved YM2413 EG accuracy (verified on YM2413 real hardware)
* fixed YM2612 self-feedback regression introduced in 1.7.1
* fixed YM2612 one-sample extra delay on operator1 output
* fixed YM2612 LFO PM implementation: block & keyscale code should not be modified by LFO (verified on YM2612 die)
* fixed YM2612 Timer B overflow handling
* fixed YM2612 potential issue with SSG-EG inverted attenuation level on Key OFF
* fixed YM2413 carrier/modulator phase reset after channel Key ON (fixes Japanese Master System BIOS music)
* fixed YM2413 intruments ROM (verified on YM2413B die)
[Gamecube/Wii]
---------------
* added configurable BIOS & Lock-on ROM files
* added configurable NTSC filter
* added configurable FPS display & toggleable fast-forward key combo
(HOME + MINUS with Wii controllers or R TRIGGER + START with Gamecube controller)
* added 50hz progressive mode (576p) support for emulation
* added WiiU GamePad Controller support on vWii (Fix94)
* reduced SRAM files size
* improved A/V Sync: when VSYNC is enabled, audio resampler output rate is now adjusted (+/-0,1 %)
to always keep audio & video synchronized and input lag is reduced by one frame.
* improved GX video rendering (fixes screen tearing when VSYNC is disabled)
* improved ROM browser scrolling speed and added support for Classic Controller +/- buttons for page scrolling
* improved Cheats Menu
* fixed bug with PICO pointer
* fixed lightgun crosshair & CD leds positionning when using NTSC filter
* fixed low-pass filter menu setting
* various code cleanup & optimizations
[Gamecube]
---------------
* improved progressive mode switch request on startup when component cable is detected
* disabled simultaneous multiple .ogg files opening (fixes crashes caused to RAM size limitation)
* fixed broken DVD support
[Wii]
---------------
* added support for Wii U Pro Controller
* added Wiimote pointer calibration in Menu settings
* added configurable Wiimote timeout
* added game auto-load support through DOL args (compatible with "Wiiflow" plugin arguments)
* fixed support for 3rd-party classic controllers with invalid calibration settings
[GCW0]
---------------
* added GCW Zero port by Shin-NiL & David Knight (based on SDL port)
[PSP2]
---------------
* added PS VITA port by frangarcj
[libretro]
---------------
* added optional bootrom support for Master System, Game Gear & Mega Drive / Genesis
* added support for all emulated devices (except Activator)
* added support for in-game resolution changes through RETRO_ENVIRONMENT_SET_SYSTEM_AV_INFO
* added support for .mdx ROM files
* added missing core settings (system hardware, region, lock-on, multitap, master system FM,...)
* fixed incorrect SRAM file saving
* fixed framebuffer size for PAL interlaced mode
* fixed viewport width when NTSC Filter is enabled with Mega Drive or Mega CD games using H-32 mode
* code cleanup
---------------------------------------------------------------------------------------------------------
Genesis Plus GX 1.7.4 (21/06/2013) (Eke-Eke)
---------------------------------------------------------------------------------------------------------
[Core/SCD]
---------------
* fixed access to read-only registers on Main-CPU side ("Batman Returns" platform level freeze)
* fixed & improved emulation of PRG-RAM write protection register ("Lunar Eternal Blue" japanese version freeze)
* improved SUB & MAIN-CPU synchronization ("Dracula Unleashed" freeze when using US Model 2 BIOS)
* improved CPU polling detection
* improved CDD emulation & added CD drive access time for SEEK command ("Panic!/Switch" intro missing scene)
* added missing reinitialization of MAIN-CPU PRG-RAM bank on reset
* added .OGG audio tracks support through LIBTREMOR
[Core/Sound]
---------------
* fixed YM2612 configurable DAC depth emulation
* improved Low-Pass filter
* added optional "MONO" output mode
[Core/VDP]
---------------
* fixed FIFO access timings when using invalid write code value ("Clue" menu)
* fixed DMA Copy with undocumented code value ("Fatal Labyrinth" end sequence)
* minor code fixes & optimizations
[Core/CPU]
---------------
* optimized 68k stack read/write functions
* fixed broken 68k address error emulation
* fixed 68k interrupt behavior (prevents interrupts from being executed multiple time when 68k is halted)
* fixed Z80 registers initial state, added proper initialization when using PBC (verified on real hardware by Charles McDonald)
[Core/MD]
---------------
* fixed SRAM incompatibilities between BIG ENDIAN & LITTLE ENDIAN platforms (note: this breaks old .srm files with LITTLE ENDIAN platform ports)
* added support for a few recently dumped unlicensed games
* added auto-detection of byte-swapped ROM files
[Gamecube/Wii]
---------------
* fixed CD Leds positioning when using NTSC filter
* improved on-screen CD Leds (thanks to Iceknight)
* various code fixes & improvements
---------------------------------------------------------------------------------------------------------
Genesis Plus GX 1.7.3 (26/11/2012) (Eke-Eke)
---------------------------------------------------------------------------------------------------------
[Gamecube/Wii]
---------------
* fixed broken input system initialization
---------------------------------------------------------------------------------------------------------
Genesis Plus GX 1.7.2 (24/11/2012) (Eke-Eke)
---------------------------------------------------------------------------------------------------------
[Core/SCD]
---------------
* added default TOC for Shadow of the Beast II (prevent hangs when audio tracks are missing)
* fixed CD-DA fader muting
* fixed PCM channels panning on reset
* fixed backup RAM file management when using disc swap with Mode 1 cartridge
* incremented CD drive read latency: fixes Space Adventure Cobra (freeze when opening coffin at 2nd morgue scene)
* improved CDD emulation accuracy: fixes Snatcher (freeze at the end of Act 2) & various CD player bugs
* improved MAIN-SUB memory map mirroring in SCD mode (verified on real hardware by Charles McDonald)
* implemented cycle-accurate "stopwatch" register emulation
[Core/Sound]
---------------
* fixed broken PSG noise frequency
* fixed incorrect Game Gear PSG stereo emulation
* implemented cycle-accurate Game Gear PSG stereo
[Core/VDP]
---------------
* fixed broken VDP DMA from SVP ROM latency (graphic errors in Virtua Racing)
[Core/MD]
---------------
* added Super Mario World 64 (unlicensed) cartridge hardware emulation
[Core/Input]
---------------
* added automatic detection for CD games with Justifier/Menacer support
* improved Justifier/Menacer emulation
[Gamecube/Wii]
---------------
* fixed screen rendering when borders are disabled
* added configurable on-screen CD leds
[Wii]
---------------
* DVD light now indicates when virtual CD tray is open
* fixed automatic input settings detection
* improved lightgun crosshair positionning
---------------------------------------------------------------------------------------------------------
Genesis Plus GX 1.7.1 (13/10/2012) (Eke-Eke)
---------------------------------------------------------------------------------------------------------
[Core/SCD]
---------------
* added support for CUE files
* added CD-DA tracks emulation (needs CUE+BIN or ISO+WAV images)
* added CD fader emulation
* added CDD "Fast FW" & "Fast RW" commands emulation
* improved CDD TOC emulation (random freezes in Sonic CD, Switch/Panic, Final Fight CD and probably many others)
* improved PCM chip synchronization with SUB-CPU (missing speeches in Willy Beamish)
* fixed PCM chip emulation (random hangs in Snatcher, missing sound effects in Switch/Panic, Final Fight CD, Wonderdog...)
* fixed Word-RAM memory mode on soft-reset (missing logo gfx effects)
* fixed SUB-CPU access to unused areas when using PC-relative instructions (Final Fight CD first boss random crash)
* fixed CPU idle loop detection on memory mode register access (Pugsy CD first boss slowdown)
* fixed Mode 1 emulation (cartridge boot mode)
[Core/Sound]
---------------
* replaced FIR resampler by Blip Buffer for FM resampling
* modified SN76489 core for use of Blip Buffer
* improved PSG & FM chips synchronization using Blip Buffer
* added Game Gear PSG stereo support
* fixed SG-1000 specific PSG noise
* fixed YM2612 LFO AM waveform (California Games surfing event)
* fixed YM2612 phase precision
* minor optimizations to YM2612 core
[Core/Game Gear]
---------------
* added support for CJ Elephant Fugitive (recently released by SMS Power)
* added Game Gear extended screen option
[Core/Genesis]
---------------
* added support for a few recently dumped (but unreleased) games
[Core/General]
---------------
* improved ROM & CD image file loading
* various code cleanup
[Gamecube/Wii]
---------------
* added automatic disc swap feature
* removed automatic frameskipping (no use)
* improved general audio/video sync
* various code cleanup & bugfixes
---------------------------------------------------------------------------------------------------------
Genesis Plus GX 1.7.0 (01/07/2012) (Eke-Eke)
---------------------------------------------------------------------------------------------------------
[Core/SCD]
---------------
* added Mega CD / Sega CD hardware emulation (incl. Sub 68K, CDD, CDC, PCM, GFX rotation/scaling, etc)
* added .ISO & .BIN CD image file support
* added 512K backup cartridge RAM support
* added savestate support for CD games
NOTES:
~~~~~~
* to play CD games, original BIOS ROM files are required in /genplus/bios/ directory: unzip & rename them to bios_CD_U.bin, bios_CD_E.bin, bios_CD_J.bin
* CD audio tracks (CD-DA) are not supported (yet)
[Core/CPU]
---------------
* modified 68k core for Mega CD / Sega CD support
* optimized 68k core using prebuild const tables
[Core/VDP]
---------------
* improved DMA accuracy
* improved accuracy of nametables register & VSRAM writes during HBLANK: fixes "The Adventures of Batman & Robin" (graphical issues during 2nd Boss fight).
* added support for 8-bit VRAM writes with undocumented code value (verified on real hardware by Nemesis)
[Core/Sound]
---------------
* improved synchronization between SN76489 & YM2162 cores.
* improved accuracy of SN76489 core timings.
[Core/MD]
---------------
* added support for some recently dumped unlicensed games.
* improved emulation of 32k bankswitch hardware used by a few unlicensed games.
* fixed behavior of Z80 banked reads from 68k RAM (verified on real hardware).
* fixed support for 128K Pro Action Replay ROM.
[Core/MS]
---------------
* added support for all recent korean ROM dumps by SMS Power.
* added emulation of korean multi-game mapper (4-Pak All Action)
* added pseudo-random RAM pattern initialization on Mark-III and Japanese Master System (fixes "Alibaba and 40 Thieves" & "Block Hole")
* added port $3E emulation & internal BOOTROM support (Master System & Game Gear only).
[Core/General]
---------------
* added an option to set VDP mode (PAL/NTSC) independently from console region.
* added an option to select original system master clock frequency (PAL/NTSC/AUTO), emulation will run at selected frequency when VSYNC is disabled.
* fixed 68k context loading/saving (Sol Deace).
* fixed C89 incompatibilities for better portability.
* removed use of "long int" type for portability on 64-bit platforms.
* moved savestate zlib compression out of emulation core (for ports that don't use it).
* various optimizations.
[Gamecube/Wii]
---------------
* removed ROM load device selection from Load Menu: default ROM device must now be configured in menu settings.
* added specific load buttons, browsers & saved paths for each systems, this also fixes slowdowns caused by screenshot loading when browsing from slow devices.
* added support for left/right buttons as page up/down keys in ROM browsers
* added right analog stick as default "return to menu" key for Gamecube controllers
* added alternate remappable menu key combo for Gamecube controllers
* added an option to disable VSYNC (emulator is synced with audio hardware instead of video).
* added an option to boot system from "BIOS", with or without cartridge.
* added Master System & Game Gear "BIOS" support (files should be named bios_U.sms, bios_J.sms, bios_E.sms & bios.gg and copied to /genplus/bios directory).
* replaced "Hard Reset" button by a Soft Reset for systems having a Reset button (Mega Drive / Genesis & Master System)
* State & SRAM files are now only compressed when saving to Gamecube Memory Cards
* various fixes & cleanup.
* compiled with devkitPPC r26 & libogc 1.8.11.
[Gamecube]
----------
* improved progressive mode support when component cable is detected (hold B during startup to switch menu video mode configuration)
---------------------------------------------------------------------------------------------------------
Genesis Plus GX 1.6.0 (07/08/2011) (Eke-Eke)
---------------------------------------------------------------------------------------------------------
[Core/Sound]
---------------
* added YM2413 emulation in Master System compatibility mode.
* fixed SN76489 noise boost initialization.
* minor YM2612 core optimizations.
[Core/VDP]
---------------
* added accurate emulation of SG-1000, Master System (315-5124, 315-5246) & Game Gear VDP.
* added support for all TMS9918 rendering modes.
* improved Mega Drive VDP timings accuracy in Master System Compatibility mode.
* fixed color palette initialization.
* fixed shifted sprites rendering in Mode 4.
* modified pixel rendering support (pixel depth is now forced at compilation time).
[Core/CPU]
---------------
* optimized 68k core (rewrote 68k interrupt handling, removed multiple CPU types support & unused code) for 5~8% speed improvment
[Core/IO]
---------------
* added accurate emulation of Master System (315-5216, 315-5237, 315-5297) & Game Gear I/O controllers.
* added Terebi Oekaki tablet emulation.
* improved Mouse emulation (fixes mouse support in Cannon Fodder).
* improved Justifier emulation (fixes gun support in Lethal Enforcers 2).
* improved 6-Buttons control pad emulation (fixes Duke Nukem 3D)
* modified lightgun emulation to use common key inputs for all devices.
* 2-buttons controller is now picked by default for Master System games.
[Core/MD]
---------------
* added copy-protection hardware emulation for some new dumped games (Tiny Toon Adventures 3, Mighty Morphin Power Rangers & The Battle of Red Cliffs).
* added Game Toshokan in EEPROM database (verified on real cartridge).
* fixed Micro Machines 2 - Turbo Tournament EEPROM size (verified on real cartridge).
* modified SRAM banswitch hardware emulation to be more compatible with some hacks.
[Core/MS]
---------------
* added Cyborg Z to Korean mapper database.
*
[Core/GG]
---------------
* added 93C46 EEPROM emulation (Majors Pro Baseball, World Series Baseball & World Series Baseball 95).
[Core/General]
---------------
* added support for .mdx ROM format.
* added Game Gear & SG-1000 ROM support.
* added accurate emulation of SG-1000, Master System (I, II) & Game Gear hardware models for 100% compatibility.
* updated to new Genesis Plus license (see http://cgfm2.emuviews.com/)
* various code cleanup.
[Gamecube/Wii]
---------------
* IMPORTANT: cheats, screenshots & save files are now stored in console-specific directories (ex: /snaps/md, /cheats/ms, /saves/gg, ...)
* added 8-bit Action Replay & Game Genie codes support (for Master System & Game Gear games).
* improved audio/video synchronization for PAL games in 50Hz TV modes (now use VSYNC like NTSC games in 60hz modes).
* improved gun cursor positioning accuracy.
* improved horizontal scaling & screenshots rendering in H32 mode.
* fixed a bug with ROM file extension handling that would affect cheats, snapshots, sram & savestate files.
* removed ARAM/injected ROM support (unused).
* removed WPAD_ and PAD_ update from VSYNC callback.
* increased GCC inlining limits for some speed improvment.
* compiled with devkitPPC r24 & libogc 1.8.7.
---------------------------------------------------------------------------------------------------------
Genesis Plus GX 1.5.0 (31/03/2011) (Eke-Eke)
---------------------------------------------------------------------------------------------------------
[Core/VDP]
---------------
* added support for Master System compatibility mode (Z80 ports access mode), incl. Mode 5 rendering.
* added Mode 4 rendering for both Genesis & Master System modes.
* added alternate BG planes rendering functions (should be faster on PPC architectures).
[Core/IO]
---------------
* added support for Master System compatibility mode (Z80 ports access mode).
* added Master System peripherals emulation (Control Pad, Paddle, Sports Pad & Light Phaser).
* added XE-1AP (analog controller) emulation.
* added Activator emulation.
[Core/Extra]
---------------
* added support for all known Master System cartridge mappers.
* added copy-protection hardware emulation for a few MD unlicensed games: fixes 777 Casino (crash when talking to bunny girls).
(NB: most of those unlicensed games seem to have been already patched by ROM dumpers, main purpose is documenting them)
* added support for Top Shooter arcade board controller. (A=Shoot, B=Bet, C/RIGHT=Coins, START=Start, hold UP on startup to enter service mode)
* improved King of Fighters 98 mapper emulation (registers address decoding is now 100% accurate)
* fixed Game Genie when several codes affect same ROM address.
* fixed EEPROM types for Brian Lara Cricket & NBA Jam TE (verified on real cartridges)
[Core/General]
---------------
* added Master System compatibility mode emulation (automatically enabled when loading ROM file with .sms extension).
* improved savestate stability & compatibility (support for old 1.4.x savestates is preserved)
* various code cleanup & comments.
[Gamecube/Wii]
---------------
* fixed cheat codes handling when several codes affect same ROM address.
* improved input controller detection on menu exit.
* improved key remapping dialog box to match emulated device
* changed Menu key for Gamecube controller to allow MODE button mapping
* fixed DVD not being unmounted on swap (memory leak)
[Wii only]
---------------
* added USB mouse support for Sega Mouse emulation
* compiled with latest libogc: improves USB compatibility & fixes stability issues with Wiimotes.
---------------------------------------------------------------------------------------------------------
Genesis Plus GX 1.4.1 (04/12/2010) (Eke-Eke)
---------------------------------------------------------------------------------------------------------
[Core/VDP]
---------------
* improved VBLANK flag accuracy, as observed on real hardware.
* improved DMA operations accuracy, writes are now performed on a scanline basis: fixes Gaiares (flickering title screen).
* improved DMA Fill timing accuracy.
* fixed DMA with bad code values: fixes Williams Arcade Classics (corrupted gfx after soft reset).
* fixed horizontal resolution changes during HBLANK: fixes Bugs Bunny in Double Trouble (2nd stage).
* fixed Vertical Counter in interlace mode 1, as observed on real hardware.
* fixed horizontal border width, as observed on real hardware.
* various code improvments & optimizations.
[Core/Extra]
---------------
* improved savestate format: added DMA, SVP, cartridge mapping & internal registers state informations
* improved unlicensed ROM mappers emulation
* added Chinese Fighters III mapper support
* added Top Fighter mapper support
* fixed Barver Battle Saga mapper support
* fixed cartridge hardware soft-reset (Game Genie, SVP, ...)
* fixed Game Genie registers byte reads
[Gamecube/Wii]
---------------
* added message box when inputs config uses disconnected controllers.
* added message box when settings are reseted to default on startup.
* fixed default inputs configuration.
* fixed memory leak in Cheat Menu causing spurious resets.
* added an option to enable/disable automatic cheat activation
* increased max number of cheat codes
* optimized cheat codes requiring RAM patching.
* improved default horizontal scaling to better match output from a real Mega Drive
[Gamecube specific]
---------------
* fixed inverted keys in cheat menu.
* fixed audio input frequency, now use exact audio hardware samplerate, as measured on my Game Cube (~48044 Hz),
(NB: Wii samplerate has been verified to be closer to 48000 Hz)
[Wii specific]
---------------
* added the possibility for any wiimotes to be used as input device, regardless of the connected expansion controller.
* fixed USB drive not being detected when application is loaded from USB (HBC), thanks to Tantric for the tips.
---------------------------------------------------------------------------------------------------------
Genesis Plus GX 1.4.0 (01/11/2010) (Eke-Eke)
---------------------------------------------------------------------------------------------------------
[Core/Sound]
---------------
* completely rewrote sound processing/mixing: sound chips are now clocked with exact output framerate
to ensure 100% smooth video & audio playback, with no lag or skipping, while rendering an accurate number
of samples per frame and keeping PSG & FM chips in sync.
* improved PSG & FM chips synchronization with CPU execution (fixed point precision).
* improved YM2612 core general accuracy (SSG-EG, CSM mode,...) (based upon Nemesis recent tests on real hardware)
* improved YM2612 LFO emulation accuracy: fixes "Spider-Man & Venom : Separation Anxiety" (intro)
* fixed YM2612 bug with Timer B: fixes "Langrisser Hikari II"/"Der Langrisser II" (Sega logo)
* fixed YM2612 context saving/loading.
* fixed YM2612 state on reset.
* removed outdated & less accurate Gens YM2612 core
* added configurable YM2612 DAC resolution emulation.
* added configurable & faster FIR resampler (thanks to Blargg & AamirM), removed libsamplerate support.
* added configurable Low-Pass filtering
* added configurable 3-Band Equalizer (thanks to Neil C).
* added an option to boost SN76489 Noise Channel.
* adjusted SN76489 cut-off frequency.
* implemented Blargg's blip buffer in SN76489 core (all channels are now lineary interpolated)
[Core/VDP]
---------------
* added support for CRAM writes during horizontal blanking (Striker, Zero the Kamikaze Squirrel,...)
* added support for 2-Cell vertical scrolling in Interlaced 2 mode
* added support for some undocumented mode register bits
* added proper emulation of HV Counter latch: fixes Sunset Riders intro
* added pixel-accurate emulation of mid-line display on/off (Nigel Mansell World Championship PAL, Ren & Stimpy's Invention PAL,...)
* improved 2-cell vscroll emulation accuracy, as verified on real hardware (Gynoug, Cutie Suzuki no Ringside Angel, Formula One, Kawasaki Superbike Challenge)
* improved FIFO timings accuracy: fixes Sol Deace intro
* improved sprite masking accuracy (thanks to Nemesis for his test program)
* improved sprites processing accuracy: fixes (un)masked sprites in Mickey Mania (3D level), Sonic 2 (VS mode).
* improved HBLANK flag timing accuracy: fixes Mega Turrican (Sky level)
* improved horizontal blanking & HINT/VINT occurence timing accuracy, as measured on real hardware.
* improved HCounter accuracy in 40-cell mode, as measured on real hardware.
* improved color accuracy in VDP highlight mode to match results observed on real hardware
[Core/CPU]
---------------
* updated Z80 core to last version (fixes interrupt Mode 0 timing and some BIT instructions).
* fixed some Z80 instructions timing.
* fixed state of Z80 registers on reset (sound issues with Defender & Defender 2 in Williams Arcade Classics)
* improved Z80 interrupt accuracy
* improved 68k accuracy (initial Reset timing + auto-vectored interrupts handling).
* improved 68k timing accuracy for DIVU/DVIS (thanks to Jorge Cwik) & MULU/MULS instructions.
* implemented 68k undocumented flags behavior for DIVU/DIVS instructions (Bloodshot / Battle Frenzy)
* improved Z80 & 68k cpu execution/synchronization accuracy by using Master Clock as common reference (now run exactly 3420 M-Cycles per line).
* modified Z80 & 68k cores to directly use external cycle count instead of intermediate counters.
[Core/Extra]
---------------
* added Game Genie hardware emulation.
* added Action Replay & Pro Action Replay hardware emulation (only preliminary Pro Action Replay 2 support).
* added Sonic & Knuckles "Lock-On" support.
* added Cartridge "Hot Swap" feature.
* added missing EEPROM support in more games.
* added VDP lock-out emulation (TMSS).
* improved emulation of copy-protection hardware found in some unlicensed cartridges (Mulan, Pocket Monsters II).
* fixed Realtec mapper emulation: fixes missing sound in Balloon Boy / Funny World.
* fixed lightgun auto-detection: fixes default cursor position in Lethal Enforcers II.
* enabled simultaneous use of multitap & J-CART (Super Skidmarks 6-player mode)
* lots of code cleanup, bugfixes & optimization.
[Gamecube/Wii]
---------------
* implemented custom FONT engine (uses internal IPL font & GX hardware rendering).
* implemented custom GUI engine (uses GX hardware rendering & multithreading)
* implemented advanced menu interface (IR pointing, game snapshots, cheats & saves manager, visual & sound effects, BGM support, etc).
* improved audio/video synchronization to ensure 100% smooth video & audio playback.
* improved soft-reset button support, now works more like real Mega Drive / Genesis (model 1) reset button.
* improved lightgun cursors layout.
* added automatic ROM loading feature (last played game launches immediately when starting the emulator)
* added PAR codes and .pat files support
* fixed lot of stability issues and potential memory leaks.
[Wii specific]
---------------
* added Video Hardware "Gamma" control
* added Video Hardware "Trap Filter" control
* improved Mouse emulation through Wii remote
* compiled with devkitPPC r22 & libOGC 1.8.5 (includes SDHC & USB2 support through IOS58, removes DVDX support)
---------------------------------------------------------------------------------------------------------
Genesis Plus GX 1.3.1 (20/12/2008) (Eke-Eke)
---------------------------------------------------------------------------------------------------------
[Gamecube/Wii]
* improved sound engine
* modified frame synchronization (now use audio DMA interrupt)
---------------------------------------------------------------------------------------------------------
Genesis Plus GX 1.3.0 (14/12/2008) (Eke-Eke)
---------------------------------------------------------------------------------------------------------
[Core]
* YM2612 bugfixes (MAME core):
.fixed EG Decay->Substain transition when SL & DR are minimals: fix tracks #3 and #9 in "Mega Turrican"
.fixed a bug in SSG-EG emulation code: fix Level 1 music in "Alisia Dragoon"
.modified SSG-EG Decay End Level: fix some sound effects (ChainSaw, Zap...) in "Beavis & Butthead"
.improved Detune overflow accuracy: fix very high frequency sounds in many games
.fixed registers 0x20-0x26 Reset state: fix intro music in "B.O.B"
.reverted incorrect fix with KEY ON: fix "Flamethrower" sound effect in "Alien 3" and many others
* adjusted HCounter values: fixes line flickering in "Sonic 3D" bonus stage
* adjusted VINT timing: fixes hang-up in "V.R Troopers"
* improved HBLANK flag accuracy: fixes line flickering in "Gouketsuji Ichizoku"
* fixed broken Z80 access to WRAM: fixes hang-up in "Mamono Hunter Youko"
* modified JCART emulation: fixes corrupted tracks logo in "Micro Machines 2"
* added Blargg's NTSC Filters support (NTSC video artifacts emulation)
* optimized VDP rendering core, rewrote 68k interface (memory handlers, cycle execution, interrupts): greatly improved emulation speed
[Gamecube/Wii]
* remove slowest libsamplerate settings under "HQ YM2612" option, only keeps SRC_LINEAR (faster) and SRC_SINC_FAST (better)
* added an option to enable/disable bilinear filtering
* rewrote video engine: improved horizontal scaling (VI+GX), improved rendering speed (direct texture mapping)
* removed embedded font, (re)enabled IPL font support: now should works for Qoob users too (thanks to emukiddid)
* fixed "Reset" button behavior, now acts more like Genesis Reset button ;-)
* patched libfat for faster SDCARD accesses (thanks to svpe)
* SRAM and SaveState filenames are now based on the ROM filename (for FAT devices only)
* various bugfixes, menu tweaks and code cleanup
[Gamecube]
* added 480p support in menu
[Wii]
* implemented fast scrolling in menu using Wiimote D-PAD
* added "Power" button support
* added USB Storage support
* Widescreen menu fix
* *new* libogc 1.7.0 features: SDHC support, Wiimote shutdown button support
---------------------------------------------------------------------------------------------------------
Genesis Plus GX release 080826 (Eke-Eke)
---------------------------------------------------------------------------------------------------------
[Core]
* YM2612(MAME): fixed LFO phase update for CH3 special mode: fix sound effects in Warlock & Aladdin (thanks to AamirM)
* YM2612(MAME): fixed EG attenuation level on "KEY ON": fix Ecco 2's splash sound
* YM2612(MAME): fixed SSG-EG emulation: fix Bubba'n Stix (Track 5) and many others
* YM2612(MAME): replaced sample interpolation with libsamplerate support, High Quality mode is now more accurate
* implemented cycle-accurate HINT timings: every timing sensitive games/demos are now *finally* working fine
* fixed a bug affecting CRAM/VSRAM DMA timings
* fixed Sprite Attribute Table address mask for VRAM writes
* improved accuracy of 68k access to Z80: fix music in Pacman 2 when entering PAUSE menu
* disabled "Address Error" emulation when UMK3 hack is loaded: fix game crashing after a round ends up
* added support for some more unlicensed games: Pocket Monster, King of Fighter 98, Soul Blade (credits to Haze)
* improved Menacer emulation: fix lightgun support in Body Count & T2: The Arcade Game
* added Konami Justifier emulation: fix lightgun support in Lethal Enforcers 1 & 2
* added Sega Mouse emulation (Populous 2, Body Count, Shangai 2, Fun'n Games, ...)
[Gamecube/Wii]
* added Wiimote support for Menacer/Justifier/Mouse
* added DVD support in Wii mode (no modchip required)
* added "Gun cursor" option to enable/disable gun position display
* added "Invert Mouse" option to invert Sega Mouse vertical axe (required by some games)
* improved Controller options: Wiimote/Nunchuk and Classical Controllers can now be affected separately to ANY player
---------------------------------------------------------------------------------------------------------
Genesis Plus GX release 080716 (Eke-Eke)
---------------------------------------------------------------------------------------------------------
[Core]
* adjusted (again) HINT timings: fix Double Dragon 2 (game freezed), hopefully does not break anything else
* fixed broken EEPROM support for Codemaster games
* modified input update timings: fix Dungeons & Dragons * Warriors of the Eternal Sun (thanks to Notaz)
* added support for "Ultimate Mortal Kombat Trilogy" hack (max. size supported is 10MBytes)
* added (VERY) preliminar support for PICO roms (credits to Notaz for his documentation)
* improved YM2612 emulation (credits to Nemesis for his tests on real hardware):
.implemented phase overflow emulation: improved fix for special music instrument used in Comix Zone, Flashback, Ariel, Shaq Fu...
.improved SSG-EG emulation in MAME core (also based on additional code from Alone Coder)
.improved Timers emulation accuracy
.improved Enveloppe Generator accuracy
.fixed Channel 3 CSM mode emulation
.implemented sample interpolation in MAME core to emulate the chip at original frequency (HQ YM2612 mode, from gens)
[Gamecube/Wii]
* added automatic alphabetical filesorting (Marty Disibio)
* added ROM History for faster ROM access (Marty Disibio)
* fixed a silly input bug in "ROM Infos" & "Game Genie" menus
* modified "Hard Reset" option
* improved display sharpness in original rendering mode (H40 cell mode only), filtering is now completely disabled
* enabled overscan emulation in "STRETCH" aspect mode also
* added support for horizontal wiimote handling in Menu (automatically used when the wiimote is not pointed towards the screen)
* improved Controller options
.prevented keys reconfiguration if device is not detected
.added support for up to 8 players (ISS Pro Deluxe, ...)
.each player can be affected to a custom device (GAMECUBE Pad, WIIMOTE/NUNCHUK or CLASSIC)
.added the ability to use classic controller & wiimote pad from the same port separately
.modified "soft-reset" key on the Wiimote to avoid "accidental" resets (now press Buttons + & * simultaneously)
.added MODE button mapping: use "START+Z" on gamepad or "Button Minus" on wiimote/classic (not reconfigurable)
.added automatic configuration save for controller options
---------------------------------------------------------------------------------------------------------
Genesis Plus GX release 080601 (Eke-Eke)
---------------------------------------------------------------------------------------------------------
[Core]
* improved HCounter accuracy: fix graphic glitches in "Striker (Europe)"
* improved HINT timing accuracy: fix flickering in "Zero The Kamikaze Squirrel (USA)"
* improved rendering accuracy when backdrop color is modified during HBLANK (Road Rash I/II/III)
* fixed broken Game Genie support
[Gamecube/Wii]
* added full horizontal scaling (up to 720 pixels) when using "stretch" aspect mode (use Xscale to increase width)
* added progressive mode support (480p) in menu also
* added automatic SRAM/FreezeState support (OFF by default, check "system options")
* added automatic configuration file support
* /genplus/saves is now automatically created if it does not exist
* use libfat automatic SDCARD detection: default slot is now always used when accessing SDCARD
* assigned Reset Button to Genesis Soft-Reset
[Wii]
* added automatic TV mode detection (from SYSCONF), no more PAL60 version needed
* added option to return to Wii System Menu
* fixed "TP reload" option: now compatible with HB channel
* removed SD-Gekko support (Wii slot becomes default slot)
* added Wii SD slot support for SRAM & FreezeState files
* added Wiimote, Nunchuk & Classic controllers support through libwiiuse (see User Manual for default keys)
* added customizable key mapping (for each configurations: wiimote only, wiimote+nunchuk or classic)
---------------------------------------------------------------------------------------------------------
Genesis Plus GX release 080419 (Eke-Eke)
---------------------------------------------------------------------------------------------------------
[Core]
* modified VINT timings a little bit: fix lockup during Desert Strike's intro
* corrected 68k interrupts handling: fix graphic glitches in Darius II/Sagaia
[Gamecube/Wii]
* fixed 60Hz "Bilinear" rendering mode (was broken in last release)
* fixed issue with the 1st file when browsing SDCARD through SD-Gekko
* fixed GX initialization: fix "freeze" issue that occured sometime when starting a game
* added "Wii Reboot" option
* added PAL 50hz support in menu (black borders)
* added progressive rendering mode support (480p) in Wii mode (not supported by the PAL60 version, use the other one !)
* compiled with a modified libogc: should definitely fix the PAL "red screen" issue for RGB-cable users (still use the PAL60 version !)
---------------------------------------------------------------------------------------------------------
Genesis Plus GX release 080406 (Eke-Eke)
---------------------------------------------------------------------------------------------------------
[Core]
* updated SVP core: fix some perspective issues in Virtua Racing (thanks to Notaz)
* added internal SAT update during VRAM Fill: fix unmasked sprites during Battletech's intro
* fixed m68k core issues with gcc 4.2.3: fix Xperts, Lemmings 2, M1 Abrams Battle Tank
* forced YM2612 Enveloppe update: fix intro music in Batman&Robin (thanks to Aamir)
[Gamecube/Wii]
* removed not working DVD features (Wii mode only)
* fixed Timers with PAL roms
* added EURGB60 TV mode support: fix "red screen" issue with PAL Wii when using RGB cable
* added PAL50 TV mode support (PAL and NTSC roms), see video options
* added "TP reload" option, use "System Reboot" (Wii mode only)
* added Front SD rom loading support with LFN & subdirectory browsing (Wii mode only)
---------------------------------------------------------------------------------------------------------
Genesis Plus GX release 080301 (Eke-Eke)
---------------------------------------------------------------------------------------------------------
[Core]
* added SVP emulation: Virtua Racing is now emulated (big thanks to Notaz and TascoDeluxe)
* fixed VDP registers behaviour when VDP Mode 4 is enabled: fix Bass Masters Classic Pro, Captain Planet & The Planeeters
* corrected a bug in DMA Fill operation: fix James Pond 3, Rockman World/Megaman Willy Wars (corrupted VRAM)
* corrected typo errors in CPU cycle counters update: fix optiom screen music in "College Slam" and probably others games.
* added preliminary support of undocumented YM2612 bug: fixes soundtracks of Shaq Fu, Spiderman, Comix Zone, Ariel and some others
* added support for mappers & copy protection devices used in many unlicensed/pirate cartridges (see cart_hw.c for details)
* rewrote memory handlers for better modularity and some (little) speedup
* reduced Savestate size
[Gamecube]
* compiled with last LibOGC (20080228): fix issues when unplugging controller, support for Wii mode (see release.txt)
* added "hard-coded" IPL font (no more direct access to BOOTROM): fix font problem for Qoob users
* added SDCARD Slot B support for loading Roms
* removed unused MAME PSG Core
* added 'Force DTACK' option for prototype games usually hanging on real hardware (example: Sonic Crackers)
* added an option to underclock SVP core (with default cycle count, Virtua Racing actually does not run fullspeed in GC mode)
* fixed frame timing in PAL mode
* fixed analog stick sensitivity
---------------------------------------------------------------------------------------------------------
Genesis Plus GX release 080107 (Eke-Eke)
---------------------------------------------------------------------------------------------------------
[Core]
* fixed interleaved rom detection: roms with .smd extension should now work fine
* fixed a recently introduced bug in VDP registers writes: fixes bad colors in Toy Story (intro)
* updated list of games using EEPROM: added Sports Talk Baseball (internal memory check fixed) and Brian Lara Cricket
* fixed VINT flag update when VINT is disabled: fixes NCAA College Football
* adjusted DMA timings in H32 mode: fixes flickering in Out of this World, Kawasaki Superbike Challenge & Formula One
* adjusted line rendering and HBLANK timings: fixes flickering in Nigel Mansell's World Championship Racing, Deadly Moves/Power Athlete
* fixed unmapped ROM reads through Z80 Bank: fixes Zombie High (Proto)
* added support for custom ROM/RAM mapping used by Game no Kanzume Otokuyou
[Gamecube]
* fixed broken SDCARD support for SRAM and Savestate files
---------------------------------------------------------------------------------------------------------
Genesis Plus GX release 071230 (Eke-Eke)
---------------------------------------------------------------------------------------------------------
[Gamecube]
* fixed ROM injector base address (DATA section 1)
---------------------------------------------------------------------------------------------------------
Genesis Plus GX release 071228 (Eke-Eke)
---------------------------------------------------------------------------------------------------------
[Core]
* many sourcecode cleanup and optimization
* completely rewrote EEPROM emulation: now support all known EEPROM types (24C01-24C65) and mappers (Sega, Acclaim, EA, Codemasters)
used in a few games (now use internal game database) as external RAM. This should at least fix save support in the following games:
. NBA Jam (alternate Acclaim mapper)
. College Slam, Frank Thomas Big Hurt Baseball (24C65 type)
. NHLPA Hockey 93, Rings of Power (EA mapper)
. Micro Machines serie, Brian Lara Cricket 96/Shane Warne Cricket (Codemasters mapper)
* external RAM is now initialized to 0xFF by default: fix Micromachines 2, Dino Dini Soccer
* fixed SRAM 16-bits memory handlers: fix some Sega Sports and EA Sports games (NFL95, NBA Action 95, NHL97, NHL98,...)
* modified WRITE_xxx & READ_xxx macros for better portability and faster memory access on BIG ENDIAN platform
* completely rewrote BIG ENDIAN support in render.c and vdp.c: rendering should be a little faster
* rewrote ROM bankswitch emulation (Super Street Fighter II): ROM access are faster, using memory pointers instead of reading ROM copy from ARAM
* fixed leftmost Window/PlaneA column render and implemented Window bug (as described by Charles Mc Donald)
* improved "Sprite Limit" and "Sprite Collision" detection accuracy
* modified RGB565 Color Palette to use the full available color range (0-31;0-63)
* implemented "cycle accurate" HV Interrupt timings: fix Sesame's Street Counting Cafe, Legend of Galahad (intro)
* improved VDP access timings accuracy (added FIFO emulation): fix Double Clutch
* improved DMA timings accuracy: fix Winter Olympics (E), Arch Rivals and probably more
* fixed HCounter again: Road Rash serie (I,II,III) don't need timing hacks anymore
* fixed VCounter in Interlaced 2 mode: fix Combat Cars "VS-Mode"
* improved Interlaced 2 mode (double resolution) rendering: Sonic 2, Combat Cars ("VS-Modes") look far better
* added TMSS BIOS support (optional)
* rewrote part of the YM2162 MAME's core: fixed internal FM timers handling, removed non-YM2612 emulation code and unused multiple cpu support
* implemented "cycle accurate" FM timers & sound samples rendering
* improved Z80 Interrupt timing accuracy: fix Sonic 3 music slowdowns
* updated Z80 & 68000 cores to last MAME versions
* improved Soft Reset emulation: X-Men 2 and Eternal Champions (random character selection) now work more like on real hardware.
* added full overscan emulation (vertical & horizontal borders) for "pixel perfect" aspect ratio (tested against a real genesis)
[Gamecube]
* fixed rom checksum calculation (only used for rom information)
* some modifications in GX rendering code.
* added support for original Genesis/Megadrive NTSC & PAL video modes: this makes games looking exactly as on original hardware (progressive rendering with reduced resolution)
* added "Aspect" option to switch between ORIGINAL (aspect ratio is fixed and borders are emulated) and MANUAL SET (horizontal and vertical scaling can be manually configured, borders are not emulated)
* added "Overscan" option to disable the original borders color and always use black borders (only used when ORIGINAL Aspect mode is enabled)
* added support for up to 720 pixels horizontal resolution (needed for proper aspect ratio emulation)
* added "TV Mode" option to enable automatic switching to PAL(50Hz) TV mode when the Genesis runs in PAL mode
* added "Xshift" & "Yshift" settings to let you adjust display area position while keeping the original aspect ratio