mirror of https://github.com/bsnes-emu/bsnes.git
85fa3cc968
bsnes is exactly three years old today. I've posted a new version which adds DSP-3 and DSP-4 special chip support. The DSP-3 is used by SD Gundam GX, and the DSP-4 is used by Top Gear 3000. Please note that the DSP-3 is not fully emulated, thusly SD Gundam GX is not fully playable. Also, due to lack of timing emulation with the DSP-4, the Top Gear 3000 track sometimes flickers in split screen mode. However, it is believed that Top Gear 3000 is fully playable.
I should also note that I have started on SuperFX emulation, as some will inevitably see said code in my source releases. What I have now is nothing more than a skeleton implementation, and absolutely nothing using it is playable yet. I am making absolutely no promises that I will ever be able to emulate this chip. It will take at least several months of work, and even then, the speed will probably be too slow to reach 60fps on any system, but ... I'm working on it. While I have no way to run tests on the actual SuperFX hardware, I will do the best I can to emulate the chip accurately. I will be emulating the caching and cycle delays as best I can, but the information I have on this chip is extremely limited, so don't expect miracles.
Lastly, as promised, I have released the special chips I have personally emulated to the public domain. See license.txt for more information if interested. I cannot release the special chips whose code I did not write to the public domain, but all of that is already available under the GPLv2 (from ZSNES) or the SNES9x license.
Changelog:
- Added DSP-3 support, thanks to John Weidman, Kris Bleakley, Lancer, z80 gaiden
- Added DSP-4 support, thanks to Dreamer Nom, John Weidman, Kris Bleakley, Nach, z80 gaiden
- Started on support for SuperFX, no games playable as chip emulation is less than 1% complete
- Unsupported special chips will now display an alert
- Missing stbios.bin file when loading Sufami Turbo cartridges will now display an alert
- Video settings now saved separately for windowed and fullscreen mode
- Advanced option video<.mode>.synchronize can be enabled for vsync, but will cause sound crackling
- Added menu option to toggle FPS counter
- Minor source code cleanup
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readme.txt
bsnes Version 0.025 Author: byuu -------- General: -------- bsnes is a Super Nintendo / Super Famicom emulator that began on October 14th, 2004. The latest version can be downloaded from: http://byuu.org/ Please see license.txt for important licensing information. -------------- Shortcut Keys: -------------- Esc - Toggle menubar visibility F11 - Toggle fullscreen mode ------------------ Known Limitations: ------------------ S-CPU - Invalid DMA / HDMA transfers not fully emulated - Multiply / Divide register delays not implemented S-PPU - Uses scanline-based renderer. This is very inaccurate, but few (if any) games rely on mid-scanline writes to function correctly - Does not support FirstSprite+Y priority - OAM / CGRAM accesses during active display not supported correctly - RTO flags are not calculated on frames that are skipped when frameskipping is enabled. This provides a major speedup, however it will cause in issues in games that test these flags, eg the SNES Test Program Electronics Test. Turning frameskipping off will allow RTO flag calculation on every frame Hardware Bugs - S-CPU.r1 HDMA crashing bug not emulated - S-CPU<>S-SMP communication bus conflicts not emulated --------------------- Unsupported Hardware: --------------------- SA-1 Coprocessor used in many popular games, including: - Dragon Ball Z Hyper Dimension - Kirby Super Star - Kirby's Dreamland 3 - Marvelous - SD Gundam G-NEXT - Super Mario RPG Super FX Coprocessor used in many popular games, including: - Doom - Star Fox - Star Fox 2 (unreleased beta) - Super Mario World 2: Yoshi's Island SPC7110 Coprocessor used only by the following games: - Far East of Eden Zero - Far East of Eden Zero: Shounen Jump no Shou - Momotarou Densetsu Happy - Super Power League 4 ST-011 SETA DSP used only by Quick-move Shogi Match with Nidan Rank-holder Morita ST-018 SETA RISC CPU used only by Quick-move Shogi Match with Nidan Rank-holder Morita 2 BS-X (Broadcast Satellite) Add-on unit sold only in Japan that played specially-made games that were downloaded via satellite BS-X Flashcart Flash cartridge used by BS-X, as well as some standalone games by Asciisoft Super Gameboy Cartridge passthrough used for playing Gameboy games ------------------------ Unsupported Controllers: ------------------------ Mouse Super Scope Justifier Multitap (4-port and 5-port)