Editing PS2 Emulation
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| VU0 is not running in sync with EE core || 24 The Game, ATV Quad Power Racing 2, Ghosthunter, Rayman Arena, Rayman 3, Largo winch, Ratchet and clank games. All games using M-bit. || EE hook AdvanceClock or fastforwardclock commands on affected addresses to push VU0 ahead while stalling EE, patches to rearrange code. Most of the time it will be CTC2/QMTC2 instructions with interlock that are affected. || Emulator kickstart VU0 for 256 cycles, while report 512 cycles passed. Yup, we are out of sync right from the start of VU0 mpg because people working for $ony don't know that VU0 run at EE MHz, not at EE bus MHz. Not to mention that 256 cycles kickstart is too much even on correct speed. Later things just got worse. This issue can be partially replicated on Pcsx2 if you overclock the EE by +3 | | VU0 is not running in sync with EE core || 24 The Game, ATV Quad Power Racing 2, Ghosthunter, Rayman Arena, Rayman 3, Largo winch, Ratchet and clank games. All games using M-bit. || EE hook AdvanceClock or fastforwardclock commands on affected addresses to push VU0 ahead while stalling EE, patches to rearrange code. Most of the time it will be CTC2/QMTC2 instructions with interlock that are affected. || Emulator kickstart VU0 for 256 cycles, while report 512 cycles passed. Yup, we are out of sync right from the start of VU0 mpg because people working for $ony don't know that VU0 run at EE MHz, not at EE bus MHz. Not to mention that 256 cycles kickstart is too much even on correct speed. Later things just got worse. This issue can be partially replicated on Pcsx2 if you overclock the EE by +3 | ||
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| FPU/VU math inaccuracies. || Koun, Tony hawk games, Devil may cry 3, Gun, TY the Tasmanian Tiger 3, Beyond Good & Evil, MTX Mototrax, Max payne, Bully, Jackie chan adventures, Wild arms 3, Pac-man World 3, Gran turismo 4, Many others || Lua patches to the EE memory, accurate math commands. || PS2 use really obscure floating point math, only one guard bit is used in calculations. PCSX2 hack it with different rounding modes, emu on ps4 fix it with soft floats, usually applied per offset. Sometime with patches directly to affected code (THPS engine) | | FPU/VU math inaccuracies. || Koun, Tony hawk games, Devil may cry 3, Gun, TY the Tasmanian Tiger 3, Beyond Good & Evil, MTX Mototrax, Max payne, Bully, Jackie chan adventures, Wild arms 3, Pac-man World 3, Gran turismo 4, Many others || Lua patches to the EE memory, accurate math commands. || PS2 use really obscure floating point math, only one guard bit is used in calculations. PCSX2 hack it with different rounding modes, emu on ps4 fix it with soft floats, usually applied per offset. Sometime with patches directly to affected code (THPS engine). | ||
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| M-Bit support is broken || '''Every game that uses M-Bit'''. Totally Spies! Totally Party, Mike Tyson Heavyweight Boxing, My Street, Crash Twinsanity, Marvel Nemesis, Panzer Elite Action - Fields of Glory, Super Monkey Ball Adventure, most Eko Software games, and many more. [https://github.com/PCSX2/pcsx2/pull/3593] || Lua patches to the EE memory || While emulator respect m-bit, way that VU0 work on it make it broken most of times (check "VU0 is not running in sync with EE core" issue). | | M-Bit support is broken || '''Every game that uses M-Bit'''. Totally Spies! Totally Party, Mike Tyson Heavyweight Boxing, My Street, Crash Twinsanity, Marvel Nemesis, Panzer Elite Action - Fields of Glory, Super Monkey Ball Adventure, most Eko Software games, and many more. [https://github.com/PCSX2/pcsx2/pull/3593] || Lua patches to the EE memory || While emulator respect m-bit, way that VU0 work on it make it broken most of times (check "VU0 is not running in sync with EE core" issue). |