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When a game writes the same value that was already configured to a BP register, Dolphin previously flushed the GPU pipeline and reconfigured the internal video state (calling SetScissor/SetLineWidth/SetDepthMode). Some of these useless writes still need to perform actions, for example writes to the EFB copy trigger or the texture preload registers (which need to reload the texture from memory).
Dolphin-emu - The Gamecube / Wii Emulator ========================================== Homesite: http://dolphin-emulator.com/ Project Site: http://code.google.com/p/dolphin-emu Dolphin-emu is a emulator for Gamecube, Wii, Triforce that lets you run Wii/GCN/Tri games on your Windows/Linux/Mac PC system. Open Source Release under GPL 2 Project Leaders: F|RES, ector Team members: http://code.google.com/p/dolphin-emu/people/ Please read the FAQ before use: http://code.google.com/p/dolphin-emu/wiki/Facts_And_Questions System Requirements: * OS: Microsoft Windows (2000/XP/Vista or higher) or Linux or Apple Mac OS X. * Processor: Fast CPU with SSE2 supported (recommended at least 2Ghz). Dual Core for speed boost. * Graphics: Any graphics card that supports Direct3D 9 or OpenGL 2.1. [Command line usage] Usage: Dolphin [-h] [-d] [-l] [-e <str>] [-b] [-V <str>] [-A <str>] -h, --help Show this help message -d, --debugger Opens the debugger -l, --logger Opens the logger -e, --exec=<str> Loads the specified file (DOL,ELF,WAD,GCM,ISO) -b, --batch Exit Dolphin with emulator -V, --video_backend=<str> Specify a video plugin -A, --audio_emulation=<str> Low level (LLE) or high level (HLE) audio [Libraries] Cg: Cg Shading API (http://developer.nvidia.com/object/cg_toolkit.html) *.pdb = Program Debug Database (use these symbols with a program debugger) [DSP Plugins] Plugin_DSP_HLE: High Level DSP Emulation Plugin_DSP_LLE: Low Level DSP Emulation [Video Backends] Direct3D9: Render with Direct3D 9 Direct3D11: Render with Direct3D 11 OpenGL: Render with OpenGL + Cg Shader Language [Sys Files] totaldb.dsy: Database of symbols (for devs only) font_ansi.bin/font_sjis.bin: font dumps setting-usa/jpn/usa.txt: config files for Wii [Support Folders] Cache: used to cache the ISO list Config: emulator configuration files Dump: anything dumped from dolphin will go here GC: Gamecube memory cards GameConfig: holds the INI game config files Load: high resolution textures Logs: logs go here Maps: symbol tables go here (dev only) OpenCL: OpenCL code ScreenShots: screenshots are saved here Shaders: post-processing shaders StateSaves: save states are stored here Wii: Wii saves and config is stored here