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Eke-eke has updated Genesis Plus GX, the Genesis Plus emulator for the Wii and GameCube, to version 1.7.0. The project supports multiple Sega systems, including Genesis, Megadrive, Master System, Game Gear, SG-1000, and the newly added Mega-CD/Sega-CD. See the extensive change log in the spoiler below for what's new in this release, and check out the project's page for more information about this homebrew.
- 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)
