diff --git a/history.txt b/history.txt index cc742c6..57e4087 100644 --- a/history.txt +++ b/history.txt @@ -1,101 +1,119 @@ -Genesis Plus GX History ------------------------------- +--------------------------------------------------------------------------------------------------------- +Genesis Plus GX 1.3.2 (??/??/????)(Eke-Eke) +--------------------------------------------------------------------------------------------------------- -[Genesis] -- modified SN76489 cut-off frequency -- various code cleanup +[Core] +------ -[NGC/Wii] -- fixed video issues in original interlaced modes -- fixed some statibilty issues +* modified SN76489 cut-off frequency +* various code cleanup + +[Gamecube/Wii] + +* improved video synchronization in original interlaced modes: fixed video issues in Sonic 2 (VS mode) +* fixed some statibilty issues -1.3.1 (20/12/2008): -------------------- -[NGC/Wii] -- improved sound engine -- modified frame synchronization (now use audio DMA interrupt) +--------------------------------------------------------------------------------------------------------- +Genesis Plus GX 1.3.1 (20/12/2008)(Eke-Eke) +--------------------------------------------------------------------------------------------------------- + +[Gamecube/Wii] + +* improved sound engine +* modified frame synchronization (now use audio DMA interrupt) -1.3.0 (14/12/2008): -------------------- -[Genesis] -- YM2612 bugfixes (MAME core): +--------------------------------------------------------------------------------------------------------- +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 +* 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 -[NGC/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/Wii] -[NGC only] -- added 480p support in menu +* 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 -[Wii only] -- 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 +[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 -26/08/2008: ------------ -[Genesis] +--------------------------------------------------------------------------------------------------------- +Genesis Plus GX release 080826(Eke-Eke) +--------------------------------------------------------------------------------------------------------- -- 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, ...) +[Core] -[NGC/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 +* 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) +--------------------------------------------------------------------------------------------------------- -16/07/2008: ------------ -[Genesis] -- 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): +[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 @@ -103,311 +121,436 @@ Genesis Plus GX History .fixed Channel 3 CSM mode emulation .implemented sample interpolation in MAME core to emulate the chip at original frequency (HQ YM2612 mode, from gens) -[NGC/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 +[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) + .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 -01/06/2008: ------------ -[Genesis] -- 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 +--------------------------------------------------------------------------------------------------------- +Genesis Plus GX release 080601(Eke-Eke) +--------------------------------------------------------------------------------------------------------- -[NGC/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 +[Core] -[Wii only] -- 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) +* 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 - -19/04/2008: ------------ -[Genesis] -- 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] -[NGC/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 !) +* 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 - -06/04/2008: ------------ -[Genesis] -- 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) +[Wii] -[NGC/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) +* 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) -01/03/2008: ------------ -[Genesis] -- 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 -[NGC] -- 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 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 !) -07/01/2008: ------------ -[Genesis] -- 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 -[NGC] -- fixed broken SDCARD support for SRAM and Savestate files +--------------------------------------------------------------------------------------------------------- +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) -30/12/2007: ------------ -- fixed ROM injector base address (DATA section 1) + +--------------------------------------------------------------------------------------------------------- +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 -28/12/2007: ------------ -[Genesis] -- many sourcecode cleanup and optimization -- completely rewrote EEPROM emulation: now support all known EEPROM types (24C01-24C65) and mappers (Sega, Acclaim, EA, Codemasters) + +--------------------------------------------------------------------------------------------------------- +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) -- 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] -[NGC] -- 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 -- added option to disable/enable SSG-EG support in FM cores: this special mode is indeed not properly emulated and some games might sound wrong when enabled -- removed "CPU Type" option, you can also now force Region (JAP/EUR/USA) without reseting the game, choose USA or JAP for 60hz, EUR for 50hz, this can be useful to bypass game region protection at startup. +* 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 +* added option to disable/enable SSG-EG support in FM cores: this special mode is indeed not properly emulated and some games might sound wrong when enabled +* removed "CPU Type" option, you can also now force Region (JAP/EUR/USA) without reseting the game, choose USA or JAP for 60hz, EUR for 50hz, this can be useful to bypass game region protection at startup. -20/07/2007: ------------ -[Genesis] -- corrected TeamPlayer support: fix multiplayer in Gauntlet 4 (Sept. version), Pengo and a lot of others -- added J-Cart support: enable multiplayer in Codemasters games (Pete Sampras, Micromachines games, Super Skidmarks) -- added serial EEPROM autodetection: fix games with bad SRAM informations in header (NBA Jam TE) -- added SVP faking: display 2D graphics in Virtua Racing (the game is however still unplayable) -- added support for more internal IO registers: fixe some unlicensed games (Wisdom Tree games...) -- added preliminary support for unmapped protection device: fix some unlicensed games with special built-in hardware (Squirell King, Lion King 2...) -- added "Soft Reset" combo (in game, use L+Z triggers): this should be like pressing the RESET button on a real Genesis and this is required +--------------------------------------------------------------------------------------------------------- +Genesis Plus GX release 070720(Eke-Eke) +--------------------------------------------------------------------------------------------------------- + +[Core] + +* corrected TeamPlayer support: fix multiplayer in Gauntlet 4 (Sept. version), Pengo and a lot of others +* added J-Cart support: enable multiplayer in Codemasters games (Pete Sampras, Micromachines games, Super Skidmarks) +* added serial EEPROM autodetection: fix games with bad SRAM informations in header (NBA Jam TE) +* added SVP faking: display 2D graphics in Virtua Racing (the game is however still unplayable) +* added support for more internal IO registers: fixe some unlicensed games (Wisdom Tree games...) +* added preliminary support for unmapped protection device: fix some unlicensed games with special built-in hardware (Squirell King, Lion King 2...) +* added "Soft Reset" combo (in game, use L+Z triggers): this should be like pressing the RESET button on a real Genesis and this is required in some games to enable special features or even complete the game (ex: X-Men). -[NGC] -- added separate configuration for PortA/PortB inputs (GAMEPAD, MULTITAP or NONE, see Joypad Config): this let you setting +[Gamecube] + +* added separate configuration for PortA/PortB inputs (GAMEPAD, MULTITAP or NONE, see Joypad Config): this let you setting PORTB as unplugged, which is needed in some games to access special modes or enable cheat codes (Alien Storm, X-Men...) -- Freezestate & SRAM files are now compressed (using zlib) -- FreezeState & SRAM files can now be saved/loaded to/from SDCARD: located in /genplus/saves/ from the root of your SDCARD -- changed initial ROMS directory for SDCARD user: now looking for /genplus/roms/ from the root of your SDCARD -- added user-transparent SRAM autoload (detection order is MCARD then SDCARD, SLOTA then SLOTB) -- "System reboot" is now used for console reboot and SD/PSO reload (if detected) -- added new font: now use original IPL font, extracted from Bootrom -- modified controls when going into the rom selection menu (DVD or SDCARD): +* Freezestate & SRAM files are now compressed (using zlib) +* FreezeState & SRAM files can now be saved/loaded to/from SDCARD: located in /genplus/saves/ from the root of your SDCARD +* changed initial ROMS directory for SDCARD user: now looking for /genplus/roms/ from the root of your SDCARD +* added user-transparent SRAM autoload (detection order is MCARD then SDCARD, SLOTA then SLOTB) +* "System reboot" is now used for console reboot and SD/PSO reload (if detected) +* added new font: now use original IPL font, extracted from Bootrom +* modified controls when going into the rom selection menu (DVD or SDCARD): . use B button to go up one directory . use Z button to quit the file selection menu . use L/R triggers to go down/up one full page . use Left/Right buttons or Analog stick to scroll the selected entry's filename when it can't be full displayed -- various menu rearrangment, minor bugfixes & sourcecode cleanup +* various menu rearrangment, minor bugfixes & sourcecode cleanup -21/06/2007: ------------ -- added 4.7GB DVD support for WII drives (the maximal allowed size for Gamecube DVD is still 1.35GB) -- removed MPAL video timings, always use 60Hz NTSC: fix display problems for PAL wii users (no more PAL50 version needed) -- added Console Reboot option in main menu (IPL Reboot) -- added Multitap support (EA 4-Way Play and Sega Teamplayer): allowed up to four players in games supporting those peripherals -- added partial Sega Menacer lightgun support (use Analog Stick): automatically set when detecting the 6-in-1 Menacer game + +--------------------------------------------------------------------------------------------------------- +Genesis Plus GX release 070621(Eke-Eke) +--------------------------------------------------------------------------------------------------------- + +[Core] + +* added Multitap support (EA 4-Way Play and Sega Teamplayer): allowed up to four players in games supporting those peripherals +* added partial Sega Menacer lightgun support: automatically set when detecting the 6-in-1 Menacer game + +[Gamecube] + +* added 4.7GB DVD support for WII drives (the maximal allowed size for Gamecube DVD is still 1.35GB) +* removed MPAL video timings, always use 60Hz NTSC: fix display problems for PAL wii users (no more PAL50 version needed) +* added Console Reboot option in main menu (IPL Reboot) -18/05/2007: ------------ -- you can now switch between FM cores without reseting the game. FM registers value are automatically restored when switching. -- modified PAL framesync a little bit: the 20ms period is now applied between the start of 2 consecutive frames, -no more between the end of the previous and the start of the next one, which seems more correct to me -- removed the previous VINT timings modification because it brokes some games (Rocket Knight, Thunderforce III,...) -- added automatic Timing configuration (VDP latency, VINT timing & alternate Line Timing) at game loading, based upon specific romname detection. + +--------------------------------------------------------------------------------------------------------- +Genesis Plus GX release 070518(Eke-Eke) +--------------------------------------------------------------------------------------------------------- + +[Core] + +* you can now switch between FM cores without reseting the game. FM registers value are automatically restored when switching. +* removed the previous VINT timings modification because it brokes some games (Rocket Knight, Thunderforce III,...) +* added automatic Timing configuration (VDP latency, VINT timing & alternate Line Timing) at game loading, based upon specific romname detection. This means you can still modify some of these options afterwards but they are now automatically set/unset when loading a game which need special timing fixes. These fixes are also automatically desactivated when the current game doesn't need them. - For information, games that are actually detected and need special timings to run properly are: .Legend of Galahad & Road Rash series (single line not rendered properly) .Sesame Street Counting Cafe (don't boot) .Chaos Engine/Soldiers of Fortune (graphic glitches on scrolling) +[Gamecube] -08/05/2007: ------------ -- corrected L & R buttons assignment: fixes Genesis X & Z buttons being inverted -- VINT timings are now a little more accurate: fixes Sesame's Street Counting Cafe -- SN76496 MAX_OUTPUT back to normal -- modified FB_WNOISE value in SN76496 core according to John Kortink's last informations -- added support for Maxim's PSG core, same as used in SMSPLUS (it becomes the default PSG core) -- updated FM core to the latest MAME version -- corrected DAC output level (fixes voices and some special FX being too low) -- added support for Gens YM2612 (FM) core (MAME's one still remains default FM core) -- added configurable preamplification for each sound cores (see Emulator Options) -- added some other configurable sound options (boost overall volume, FM improvment for Gens YM2612) +* modified PAL framesync a little bit: the 20ms period is now applied between the start of 2 consecutive frames, +no more between the end of the previous and the start of the next one, which seems more correct to me -11/04/2007: ------------ -- corrected MAX_OUTPUT value in SN76496 core: fix PSG sound (SFX) volume -- removed unused sound buffer allocation + +--------------------------------------------------------------------------------------------------------- +Genesis Plus GX release 070508(Eke-Eke) +--------------------------------------------------------------------------------------------------------- + +[Core] + +* VINT timings are now a little more accurate: fixes Sesame's Street Counting Cafe +* SN76496 MAX_OUTPUT back to normal +* modified FB_WNOISE value in SN76496 core according to John Kortink's last informations +* added support for Maxim's PSG core, same as used in SMSPLUS (it becomes the default PSG core) +* updated FM core to the latest MAME version +* corrected DAC output level (fixes voices and some special FX being too low) +* added support for Gens YM2612 (FM) core (MAME's one still remains default FM core) + +[Gamecube] + +* corrected L & R buttons assignment: fixes Genesis X & Z buttons being inverted +* added configurable preamplification for each sound cores (see Emulator Options) +* added some other configurable sound options (boost overall volume, FM improvment for Gens YM2612) -26/03/2007: ------------ -- added DVD automount: automatically call libogc DVD_Mount function if ISO PVD reading failed (idea taken from softdev's last neocdredux release). This may be useful for loading roms from a DVD after booting from SDLOAD or after stopping DVD motor. -- added "DVD motor off" feature, like in others emulators -- corrected Memory Card mounting function: EXI_ProbeReset() function was never called if the first mounting attempt failed. Should fix some of the "Unable to mount memory card" errors. +--------------------------------------------------------------------------------------------------------- +Genesis Plus GX release 070411(Eke-Eke) +--------------------------------------------------------------------------------------------------------- + +[Core] + +* corrected MAX_OUTPUT value in SN76496 core: fix PSG sound (SFX) volume +* removed unused sound buffer allocation -22/03/2007: ------------ - - added SDCARD subdirectory browsing and LFN (255 char. max) support + +--------------------------------------------------------------------------------------------------------- +Genesis Plus GX release 070326(Eke-Eke) +--------------------------------------------------------------------------------------------------------- + +[Gamecube] + +* added DVD automount: automatically call libogc DVD_Mount function if ISO PVD reading failed (idea taken from softdev's last neocdredux release). This may be useful for loading roms from a DVD after booting from SDLOAD or after stopping DVD motor. +* added "DVD motor off" feature, like in others emulators +* corrected Memory Card mounting function: EXI_ProbeReset() function was never called if the first mounting attempt failed. Should fix some of the "Unable to mount memory card" errors. -17/03/2007: ------------ - - remove some rendering unused code (only used by DOS version of genesis plus) for little speedup - - added an option to enable alternate line rendering timing (fix single line error in Road Rash series and Legend of Galahad's Intro) - - Color RAM update now always reset color 0 to border color (fix color glitches in Mortal Kombat,...) (thanks to Noop's for the idea) - - added last Softdev's modifications (normalised memory access and ASM GU functions used intead of 'C' ones) for some speedup - - updated gcaram.c to be compatible with last libogc version + +--------------------------------------------------------------------------------------------------------- +Genesis Plus GX release 070322(Eke-Eke) +--------------------------------------------------------------------------------------------------------- + +[Gamecube] + + * added SDCARD subdirectory browsing and LFN (255 char. max) support -09/03/2007: ------------ -- little rendering code speedups -- modified HV counter tables (fix graphic glitches in Skitchin's sky, Lotus 2 Recs, Panorama Cotton, Dashin Desperados & maybe more) -- completely rewrote DMA timings emulation so that it works for all games (no more cpu freezing) -- added all DMA tranfer rates handling for each three DMA modes and added dma busy flag emulation -- modified interrupts handling on VDP register #0 and #1 writes (fix Lemmings status bar) -- added VDP RAM write latency (fix Chaos Engine/Soldier of Fortune gfx glitches) -- modified FM timers handling a bit (fix Vectorman2 music) -- corrected Sprite Limit rendering (fix Sonic 1 & Micromachines 2 title screens) -- corrected IO Registers writes (fix Decap' Attack controls, no more need for alternate input) -- corrected 6 Buttons Pad emulation (fix 6buttons detection in Mortal Kombat 3, Comix Zone and other 6-buttons compatible games) -- modified sound mixing a bit according to Generator sourcecode (FM and PSG ratios seems more correct) -- added separate CPU Region (USA, Europe, Japan,...) & Speed (PAL or NTSC) choice in menu options -- modified main frame synchro in PAL mode (fix sound glitch in this mode), thanks to Softdev for the solution -- added savestates support (go to SRAM menu, memory card supports only) + +--------------------------------------------------------------------------------------------------------- +Genesis Plus GX release 070317(Eke-Eke) +--------------------------------------------------------------------------------------------------------- + +[Core] + + * Color RAM update now always reset color 0 to border color (fix color glitches in Mortal Kombat,...) (thanks to Noop's for the idea) + +[Gamecube] + + * remove some rendering unused code (only used by DOS version of genesis plus) for little speedup + * added an option to enable alternate line rendering timing (fix single line error in Road Rash series and Legend of Galahad's Intro) + * added last Softdev's modifications (normalised memory access and ASM GU functions used intead of 'C' ones) for some speedup + * updated gcaram.c to be compatible with last libogc version -07/02/2007: (Eke-Eke) ---------------------- -- fm timers fixed (fix missing music in Castle of Illusion, Quackshot, Undead Line, Wonderboy in Monster Lair, Cal 50, Turbo Outrun, Thundeforce 4 and maybe more) -- added complete EEPROM emulation (save support now works fine in Wonderboy5, Megaman Willy Wars, NBA Jam...) (credits to Notaz, adapted from Picodrive code) -- added preliminar dma timing emulation (fix bottom screen in Legend of Galahad) (credits to Notaz, adapted from Picodrive code) -- hack: clear Vint pending after Hint (INT level 4) acknowledge (fix Fatal Rewind) -- hack: modify read_bus16 to return a random value (fake fetch) (fix Time Killers) -- modified cpu execution timings, with more correct hblank and interrupts timing (fix ISS Deluxe, Double Dragon 2 and certainly more) (Based on Gens code) -- modified busreq mechanism: better synchro between z80 & 68k (no need to dejitter anymore) (Based on Gens code) -- added sprite collision detection (fix Strider 2) -- modified dma fill operation for big endian platform (fix Contra Hardcorps gfx garbage) + +--------------------------------------------------------------------------------------------------------- +Genesis Plus GX release 070309 (Eke-Eke) +--------------------------------------------------------------------------------------------------------- + +[Core] + +* little rendering code speedups +* modified HV counter tables (fix graphic glitches in Skitchin's sky, Lotus 2 Recs, Panorama Cotton, Dashin Desperados & maybe more) +* completely rewrote DMA timings emulation so that it works for all games (no more cpu freezing) +* added all DMA tranfer rates handling for each three DMA modes and added dma busy flag emulation +* modified interrupts handling on VDP register #0 and #1 writes (fix Lemmings status bar) +* added VDP RAM write latency (fix Chaos Engine/Soldier of Fortune gfx glitches) +* modified FM timers handling a bit (fix Vectorman2 music) +* corrected Sprite Limit rendering (fix Sonic 1 & Micromachines 2 title screens) +* corrected IO Registers writes (fix Decap' Attack controls, no more need for alternate input) +* corrected 6 Buttons Pad emulation (fix 6buttons detection in Mortal Kombat 3, Comix Zone and other 6-buttons compatible games) +* modified sound mixing a bit according to Generator sourcecode (FM and PSG ratios seems more correct) +* added separate CPU Region (USA, Europe, Japan,...) & Speed (PAL or NTSC) choice in menu options +* modified main frame synchro in PAL mode (fix sound glitch in this mode), thanks to Softdev for the solution +* added savestates support (go to SRAM menu, memory card supports only) -Based on Softdev's initial releases + +--------------------------------------------------------------------------------------------------------- +Genesis Plus GX release 070207 (Eke-Eke) +--------------------------------------------------------------------------------------------------------- + +[Core] + +* fm timers fixed (fix missing music in Castle of Illusion, Quackshot, Undead Line, Wonderboy in Monster Lair, Cal 50, Turbo Outrun, Thundeforce 4 and maybe more) +* added complete EEPROM emulation (save support now works fine in Wonderboy5, Megaman Willy Wars, NBA Jam...) (credits to Notaz, adapted from Picodrive code) +* added preliminar dma timing emulation (fix bottom screen in Legend of Galahad) (credits to Notaz, adapted from Picodrive code) +* hack: clear Vint pending after Hint (INT level 4) acknowledge (fix Fatal Rewind) +* hack: modify read_bus16 to return a random value (fake fetch) (fix Time Killers) +* modified cpu execution timings, with more correct hblank and interrupts timing (fix ISS Deluxe, Double Dragon 2 and certainly more) (Based on Gens code) +* modified busreq mechanism: better synchro between z80 & 68k (no need to dejitter anymore) (Based on Gens code) +* added sprite collision detection (fix Strider 2) +* modified dma fill operation for big endian platform (fix Contra Hardcorps gfx garbage) -WIP1.2 unzip.c - Added partial zip support - -WIP1.1 sio.c added - Added six button pad support from x86 Gens - Additional changes based on Charles MacDonald's gen-hw.txt - -WIP1 07 March 2006 - Updated SN76496 driver - Added GX Hardware Scaling \ No newline at end of file + +--------------------------------------------------------------------------------------------------------- +Genesis Plus GX WIP 1.2 (Softdev) +--------------------------------------------------------------------------------------------------------- + +[Gamecube] + +* Added partial zip support (unzip.c) + + + +--------------------------------------------------------------------------------------------------------- +Genesis Plus GX WIP 1.1 (Softdev) +--------------------------------------------------------------------------------------------------------- + +[Core] + +* sio.c added +* Added six button pad support from x86 Gens +* Additional changes based on Charles MacDonald's gen-hw.txt + + + +--------------------------------------------------------------------------------------------------------- +Genesis Plus GX WIP 1 - 7 March 2006 (Softdev) +--------------------------------------------------------------------------------------------------------- + +[Core] + +* Updated SN76496 driver + +[Gamecube] + +* Added GX Hardware Scaling + + + +--------------------------------------------------------------------------------------------------------- +Genesis Plus GX WIP 0 (Softdev) +--------------------------------------------------------------------------------------------------------- + +[Gamecube] + +* initial port based on Genesis Plus 1.2a from Charles McDonald (http://cgfm2.emuviews.com/) diff --git a/source/ngc/ogc_video.c b/source/ngc/ogc_video.c index 97c4b5b..bbb0626 100644 --- a/source/ngc/ogc_video.c +++ b/source/ngc/ogc_video.c @@ -497,6 +497,13 @@ static void gxScale(u32 width, u32 height) GX_InvVtxCache(); } +static void xfb_swap(u32 cnt) +{ + VIDEO_SetNextFramebuffer (xfb[whichfb]); + VIDEO_Flush (); + whichfb ^= 1; +} + /* Restore Menu Video mode */ void ogc_video__stop(void) { @@ -514,6 +521,7 @@ void ogc_video__start() /* clear screen */ VIDEO_ClearFrameBuffer(vmode, xfb[0], COLOR_BLACK); VIDEO_ClearFrameBuffer(vmode, xfb[1], COLOR_BLACK); + VIDEO_SetPreRetraceCallback(NULL); VIDEO_Flush(); VIDEO_WaitVSync(); @@ -623,6 +631,15 @@ void ogc_video__update() VIDEO_WaitVSync(); if (rmode->viTVMode & VI_NON_INTERLACE) VIDEO_WaitVSync(); else while (VIDEO_GetNextField() != odd_frame) VIDEO_WaitVSync(); + + /* resynchronize interlaced field */ + if (rmode->field_rendering) + { + whichfb = odd_frame; + VIDEO_SetPreRetraceCallback(xfb_swap); + VIDEO_Flush(); + VIDEO_WaitVSync(); + } } /* texture is now directly mapped by the line renderer */ @@ -635,13 +652,25 @@ void ogc_video__update() draw_square(); GX_DrawDone(); - /* force fields resync in SF interlaced modes*/ - if (rmode->field_rendering) odd_frame = whichfb; - - /* swap XFB */ - whichfb ^= 1; - VIDEO_SetNextFramebuffer(xfb[whichfb]); - VIDEO_Flush(); + /* in SF interlaced modes, swap is done just before VSYNC */ + /* this ensures VSYNC does not miss any fields */ + if (rmode->field_rendering) + { + /* if we are out of sync, it's better not to draw this one */ + if (odd_frame == whichfb) + { + /* resynchronize fields */ + odd_frame ^= 1; + return; + } + } + else + { + /* swap XFB */ + whichfb ^= 1; + VIDEO_SetNextFramebuffer(xfb[whichfb]); + VIDEO_Flush(); + } /* copy EFB to XFB */ GX_CopyDisp(xfb[whichfb], GX_TRUE);