Editing PS2 Emulation
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| Inaccurate COP2 add/sub implementation|| Unavailable || Driv3r || AI cop car drives at the incorrect direction (Fixed on PS4 with accurate COP2 add/sub) || #11714 | | Inaccurate COP2 add/sub implementation|| Unavailable || Driv3r || AI cop car drives at the incorrect direction (Fixed on PS4 with accurate COP2 add/sub) || #11714 | ||
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=Known issues= | |||
<pre>List of known issues in the PS4's PS2 emulator</pre> | |||
{| cellspacing="0" cellpadding="2" border="1" class="wikitable" style="text-align: center;" | |||
! Issue !! Games affected !! Solution !! Description | |||
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| <pre>Suspected iop issue(?)</pre> || Zatch Bell! Mamodo Fury, Godfather, Gran turismo 4, SSX || || a Stutter that's not caused by performance but by inaccurate iop emulation leading to stuttering fmvs/mainmenu | |||
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| <pre> Suspected GIF issue (?) </pre> || <pre>Tenchu - Fatal Shadows, Genji dawn of the samurai, Batman begins, Lara Croft Tomb Raider - The Angel of Darkness, Dragon ball z budokai tenkaichi 1, Possibly many more! </pre>|| LUA patches || | |||
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| <pre>No support for EE Cache</pre> || <pre>Ice Age 2, DOA2: Extreme, Nascar 2009, Barnyard,</pre> [https://github.com/PCSX2/pcsx2/issues/2248 Others]|| <pre>Lua patches to the EE memory and picking the right emulator</pre> || <pre>It's not a ps4 issue per say since these issues are also encountered by Pcsx2. but Pcsx2 does have support for EE cache, though it doesn't use it to fix these games because emulating EE cache is extremely slow. so that's why the Pcsx2 team decided to use pnach patches to fix this issue.</pre> | |||
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|<pre> VU0/COP2 is not running in sync with EE core </pre>|| <pre>24 The Game, ATV Quad Power Racing 2, Ghosthunter, Rayman Arena, Rayman 3, Largo winch, Ratchet and clank games. All games using M-bit.</pre> [https://github.com/PCSX2/pcsx2/issues/4439 other games affected by COP2 timing] || <pre>ee hook AdvanceClock or fastforwardclock commands on affected addresses, Most of the time it will be CTC2 instructions that are affected</pre> <pre>Or using Kozraovv's method of EE memory patching</pre> || [[Talk:PS2_Classics_Emulator_Compatibility_List#Rayman_3:_Hoodlum_havoc | Rayman 3's fix for example]] | |||
[[Talk:PS2_Classics_Emulator_Compatibility_List#Largo_Winch | Largo winch's fix for example]] | |||
<pre>This issue can also be replicated on Pcsx2 if you overclock the EE by +3</pre> | |||
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| <pre>No roundmode support for VU or FPU </pre>|| <pre>Koun, Tony hawk games, Devil may cry 3, Gun, TY the Tasmanian Tiger 3, Beyond Good & Evil, MTX Mototrax, Many others</pre> || <pre>Lua patches to the EE memory</pre> || | |||
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| <pre>No M-Bit support</pre> || '''Every game that uses M-Bit'''. <pre>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.</pre> [https://github.com/PCSX2/pcsx2/pull/3593] || <pre>Lua patches to the EE memory</pre> || <pre>M-bit: Only applicable for VU0. Ends interlock on a single QMTC2.I/CTC2.I instruction, allowing the EE to continue execution</pre> | |||
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| <pre>Wrong read speed for some games</pre> || <pre>Shadowman(Textures), God of war (Music), Ratchet and clank size matters (Music), every game that's listed to require CDVD_READ_DELAY.</pre> [https://github.com/PCSX2/pcsx2/pull/3877 and many other affected games] || Try your luck with IOP and CDVD CLI commands. || Also known in sony's bios as CDVD_READ_DELAY | |||
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| <pre>In-accurate VU0/VU1/COP2 emulation</pre> || <pre>Sly cooper games, Crash twinsanity, Crazy frog racer, Rayman 3, Koei tecmo games, Klonoa 2, others.</pre> || <pre>Choosing a VU accurate emulator such as Roguev1 or Kof2000 with the right clamping commands</pre> || <pre>The issue leads to SPS and graphical issues and sometimes freezing.</pre> | |||
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| <pre>In-accurate Multiply/Divide/Add/Subtract instructions</pre> || <pre>Max payne, Bully, Jackie chan adventures, Wild arms 3, Pac-man World 3, Gran turismo 4, Others </pre>|| <pre>Addsub/Muldiv Cli commands</pre> || <pre>Causes many geometry issues and black screens. Sony reduced the accuracy of these instructions to improve performance</pre> | |||
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| <pre>Multitap doesn't support all games</pre> || <pre>Urban reign, many others</pre> || None || | |||
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| <pre>DMA writes when busy signal is engaged</pre> || Ratchet and clank games, Metal gear solid 2, others || None yet || AKA eetiminghack | |||
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|<pre>VU1 running too fast (DMA sync)</pre> || Harry Potter the Chamber of secrets, Mercenaries 2 || None yet || | |||
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|<pre>VIF1 runs constantly(?)</pre> || <pre>Urban reign, Avatar, Parappa 2, Eternal Poison, Soul Calibur 2, Soul Calibur 3, Others</pre> || <pre>Using LUA's SchedulerDelayEvent command or Using CLI'S vif1-instant-xfer command</pre> || <pre>Sony wanted to improve the performance, which is the reason VIF1 is instant. The lua's command can be customizable to set the delay period, the cli can't, therefore lua's command is much more compatible</pre> | |||
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|<pre>Inaccuracies in the IPU</pre> || Burnout 3, Onimusha dawn of dreams || None yet || | |||
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