Editing PS2 Emulation

=2024-present year=

The PlayStation 2 emulation on the PlayStation 4 is handled with little difference to the PlayStation 3. Some issues on PS3's PS2 emulator were left unfixed on the PlayStation 4. Consequently, the PS4 inherited some of PS3's emulation glitches, and even introduced new ones. The new issues came as a result of PS4's weakness with emulation, which likely resulted in the trade of accuracy for performance.

Each PS2onPS4 package file (.pkg) includes the PS2 emulator itself. The PS4 does not have a native built-in emulator in its System Software, but it does have a few PS2 emulator specific features, like the usermode functions sceLncUtilIsPs2Emu, sceShellCoreUtilGetImposeMenuFlagForPs2Emu, sceSystemServiceAddLocalProcessForPs2Emu, and sceSystemServiceShowImposeMenuForPs2Emu.

The PS2 emulators are programmed to be accurate for the games they were designed to emulate. In turn, this makes accurate emulation challenging, as emulators include per-title patches and different default settings. The PlayStation 2 hardware is a complex system to emulate; any small change in configuration can make or break a game. Currently, the most commonly used emulator is "Jakv2" from Jak games, as it is the most compatible one out there. When game crashes are concerned in an emulated PS2 game, then the Resident Evil Code: Veronica X's emulator is typically used, whereas for VU accuracy it is Rogue Galaxy's.

The PS2 BIOS is included in the game's pkg file. It is the same PS2 BIOS as used in the ps2_netemu in PS3 Operating System. The lack of encryption mechanism for PS2 game disc image files is also huge. This time, it is a plain ISO file, but the emulator still supports LIMG sector that allows the usage of non-2048 sector size discs. Moreover, memory cards are also unencrypted, but the emulator checks the CRC of some of the regions to ensure that the memory card was not modified. The PS2 emulator on PS4 also supports LUA scripting by a "Lua Bridge", which is a powerful interface that may prove exceptionally handy in fixing games.

This is first time that Sony has ever cared about floats in its emulators. Compared to the PS3 CPU, x86-64 is doing a worse job in mimicking FPU and VU floats calculation behavior. This is resolved by clamping, accurate math used per memory offset, and/or converting floats to double precision. The emulator uses OpenCL for GS, and likely other components as well.

The rest of the CLI and LUA commands can all be found inside of any emulator's '''Eboot.bin''' file.

| --emulog-file || 0, 1 ||  Creates a log file with information that is rarely useful || --emulog-file=1

| --path-emulog || dir/folder || Sets the directory of the emulog file. Requires --emulog-file=1 command  || --path-emulog="/tmp/recordings"

| --framelimit-scalar ||  scalar/float || || --framelimit-scalar=3.2

| --ps2-lang || system  || Sets language. Might seem like a useless command, but a tiny number of games refuse to boot without a selected language. || --ps2-lang=system  

| --verbose-cpu-cycles=1 || 0,1 || ? || --verbose-cpu-cycles=1

| --pad-record ||  0, 1  ||  Enables logging pad info in emulog ||

| --mtap1 || Disabled, Always, ByHost || Multitap switch. The values are correct but the multitap only works in certain games. || --mtap1=always

| --mtap2 || Disabled, Always, ByHost || Multitap switch. Some games require multitap to be selected only on second port (1, 2-a, 2-b, 2-c layout). To achieve that, we need to disable the first mtap. In some cases, the emulator can be flawed in how it handles multi-tap when it involves "--mtap2". All functions for 2A, 2B, 2C, 2D must be redirected to ports on multi-tap 1 by using memory patches. || --mtap2=always

<pre>These commands work in config-emu-ps4.txt, but the official way to use them is through the CLI file (It is also needed for multi-disc packages). Additionally, some commands are still not discovered, and known commands might be missing their values.

All commands are pre-made. Creating new CLI commands is impossible.

Some CLI commands have no effect, as they were added to the eboot.bin without being programmed. Some useful commands were removed or added in or from different emu revisions, or their effects were changed. In some emulators, CLI configurations can be found in the ram at SceLibcHeap[0]-3-881004000.</pre>

=====[https://www.psdevwiki.com/ps2/Emotion_Engine EE]=====

<pre>Commands for the emulated Emotion Engine. These commands may improve performance, prevent crashes, or provide better core sync.</pre>

|  || Speedhacks / Desync Fixes|| ||

| --ee-cycle-scalar ||Slowest cycles speed: 5.00<br>Normal cycles speed: 1.000<br>Fastest cycles speed: 0.100 ||  Can benefit core sync or performance (lowering the cycle rate may affect FMVS). The default value for most emulators is ~1.0. It is highly sensitive, as any slight change may break or fix the game. (Possibly divides 100 with the entered value and sets the result as EE's clock speed percentage % .) || --ee-cycle-scalar=1.0  

| --ee-context-switch-cycles || Accelerate cycles (360 => 0) <br>Decelerate cycles (361 => ∞ ) || Its effects are mysterious. Possibly configures how many CPU cycles the emulator should run before switching between different tasks or threads. Does not work on Jak emulators. Default value is 360. Seems to be useful for Bee Movie, Metal Gear Solid 3, as well as others with IPU issues.|| --ee-context-switch-cycles=2700?

| [[--ee-hook|--ee-hook]] || AdvanceClock<br>FastForwardClock<br>Mfifodrain || Runs the specified functionality each time a selected EE offset is reached. FastForwardClock and AdvanceClock help fix core sync issues, but can be used as a speedhack. It is believed that AdvanceClock stalls the EE for a specified amount of cycles, while FastForwardClock behaves similarly. They are commonly used on affected COP2 instructions. Mfifodrain is still unknown. [[--ee-hook|For more examples]] ||--ee-hook=0x0025A9F2,AdvanceClock,,500 <br>--ee-hook=0x0019F0AD,FastForwardClock

| --ee-jit-pagefault-threshold || 0-254 || Ignore JIT pagefaults, usually caused by data placed right after code. JIT try to recompile it, and obviously hit some bad opcodes. This command reduces the occurrence of crashes the higher it is. || --ee-jit-pagefault-threshold=40

| --ee-ignore-segfault || none, read, write, readwrite || Ignore segmentation fault. Ignore rw from/to unmapped memory, known in pcsx2 as TLB miss (load.store) || --ee-ignore-segfault=readwrite

| --ee-native-function || memset, memcpy, strlen, strcmp, strcasecmp, litodp, dptoli, floatdidf, fptoui, fptodp, dptofp, fabs, fabsf, ieee754_atan2f, ieee754_asinf, ieee754_acosf, ieee754_sinf, ieee754_cosf, ieee754_sqrtf, asinf, acosf, sinf, cosf, sqrtf. || Hook mips function with HLE x64 native version. Much faster, but tricky to keep correct timings on ps2 VM. || --ee-native-function=memcpy,0x11e328

|-style="background-color:#FFAA00"

| --ee-ignore-break || 0, 1 || Turns a BREAK instruction into a NOP Instruction. ||  

| --ee-break-as-nop || 0, 1 || Turns a BREAK instruction into a NOP Instruction. || --ee-break-as-nop=1

| --ee-pc-coherency || 0, 1 || Flush PC register to memory on every mips opcode. Result in more accurate EE PC reg reads. ||  

| --ee-insn-flush-pc || 0, 1 || Flush PC register to memory on every mips opcode. Result in more accurate EE PC reg reads. ||

| --ee-kernel-hle ||  0, 1 || High-level emulation kernel. Apply HLE patches (used in mast1c0re part 2 Vulnerability 2). Apply EE kernel patches which run previously prepared x64 code instead of recompiling real code part. ||  

| --ee-injection-title || 0, 1 || Apply HLE patches (used in mast1c0re part 2 Vulnerability 2). Apply per title patches which run previously prepared x64 code instead of recompiling real code part. ||

| --ee-cache-breaks-block || 0,1 || End recompiler block on r5900 cache opcode. ||

| --ee-evt-check-full || 0, 1 || Perform more accurate EE event check ||  

| --ee-penalize-short-blocks || 0, 1 || Add cycles to short recompiled blocks? ||

| --ee-inline-limit-full || insn_count/integer || ||

<pre>The FPU is a fast single-precision unit that typically serves the EE by calculating in-game physics. It mostly controls the accuracy of the movement of in-game objects, or the game's gravity as a whole. In some cases, it is best to use COP2 commands with the FPU's to ensure the accuracy of the game's geometrical calculations.</pre>

| --fpu-no-clamping ||  0, 1 || Changes the clamping behavior of the FPU. It's set to 1 by default. Might fix freezing issues, or misplaced characters/items (Inaccuracies with in-game physics) || --fpu-no-clamping=0

| --fpu-accurate-muldiv  || 0 = Disabled<br>1 = Enabled  || Allows the FPU to accurately Divide/Multiply for all offsets by using software floats rather than hardware floats. (Extremely slow) || --fpu-accurate-muldiv=1

| --fpu-accurate-muldiv-range || start,end offset (0x0 - 0x1FFFFFF) || Allows the FPU to accurately Divide/Multiply in the specified ee memory range by using software floats rather than hardware floats. || --fpu-accurate-muldiv-range=0x1acce0,0x2acce0

| --fpu-rsqrt-fast-estimate || 0, 1 || Decreases RSQRT's accuracy. Enabled by default, disabling it helps with achieving full FPU accuracy. || --fpu-rsqrt-fast-estimate=1

| --fpu-accurate-mul-fast || 0, 1 || Speedhack for CLI FPU muldiv commands.  || --fpu-accurate-mul-fast=1

|-style="background-color:#FFAA00"

| --fpu-to-double || 0, 1 || Converts floats to doubles (Accurate). Limited testing shows that infinity is still wrong at 7F7FFFFF, rather than 7FFFFFFF with it enabled. || --fpu-to-double=1

===== COP2 =====

 

<pre>VU0 Macro-mode. These commands assist the FPU.</pre>

 

| --cop2-opt-flags || 0, 1 ,2 || Optimize flags upon recompilation (1 is safe, 2 update sticky, and mac flag on every status flag update) setting it to 0 can in some cases improve FPU accuracy. [https://github.com/PCSX2/pcsx2/blob/58f5a5b915915293b90e7e8f34c33f9c0424d1e8/pcsx2/x86/microVU_Misc.h#L280 More Info] || --cop2-opt-flags=1

| --cop2-di-bits || 0, 1 || 0 to skip setting invalid, and div by Zero flags in status register, and therefore improve performance. Can be used as a speedhack to skip costly calculations. || --cop2-di-bits=0

| --cop2-no-clamping ||  0, 1 || Changes the clamping behavior of the COP2. The default value is set to 1.  || --cop2-no-clamping=0

| --cop2-accurate-range || start,end offset (0x0 - 0x1FFFFFF) ||Accurate Mul/Div/Add/Sub math instructions for the COP2 by using software floats rather than hardware floats. Can be used for full COP2 mathematical accuracy in the specified range. || --cop2-accurate-range=0x123456,0x134567

| --cop2-accurate-mul-range || start,end offset (0x0 - 0x1FFFFFF) || Accurate multiplication instructions for the COP2 in the specified range by using software floats rather than hardware floats (Offset range seems not to directly match EE's) || --cop2-accurate-mul-range=0x123456,0x134567

| --cop2-accurate-mul || 1 = Enabled<br>0 = Disabled || Allows the COP2 to accurately multiply for all offsets by using software floats rather than hardware floats. (Extremely slow) || --cop2-accurate-mul=1

| --cop2-accurate-addsub-range || start,end offset (0x0 - 0x1FFFFFF) || Allows the COP2 to accurately Add/Sub in the specified ee memory range by using software floats rather than hardware floats. (Offset range seems not to directly match EE's. It is possibly 0x95400~ behind(?) || --cop2-accurate-addsub-range=0x123456,0x134567

|-style="background-color:#FFAA00"

| --cop2-regalloc || 0, 1 ? || Optimized Register Allocation(?). PCSX2 seems to have this enabled by default. Seems to slow down COP2 when disabled. ||

| --cop2-inst-q || 0, 1 || instant Q, no stalling on VWAITQ, or instances of Q. Crashes some games when enabled. ||

==== Vector Units (VU) ====

 

===== VU =====

 

<pre>Custom DSPs used to process vertex data, physics calculations, and other related tasks. Settings found here affect VU1, VU0, and COP2. They fix broken or missing geometry, black screens, and crashes.</pre>

 

| --vu-xgkick-delay  || Limit is between (0 => 31)  || Delay xgkick instruction execution. PCSX2 uses 6 cycles, PS3 uses 2-8 cycles depending on the game. A game with missing graphics will require a low value such as 0, while one that crashes might require a high value such as 7.|| --vu-xgkick-delay=8

| --vu-branch-hazard || 0, 1 || This command relates to how the emulator handles branch hazards in the Vector Units (VU). Setting it to 0 is the compatible option, while 1 might improve performance. Seems to be enabled by default. Disabling it managed to prevent "'''Batman - Rise of Sin Tzu'''" from crashing|| --vu-branch-hazard=0

| --vu-inst-mflag  || 0, 1 || Instant macflag? It's enabled by default. When disabled, some texture chunks pop and fade. || --vu-inst-mflag=1

| --vu-inst-cflag || 0, 1 || Instant cflag?  || --vu-inst-cflag=1

===== VU1 =====

 

<pre>VU1 is the Graphics Synthesizer’s alternate processing unit. Commands here typically improve performance, prevent crashes, and fix SPS (graphical glitches).</pre>

| --vu1-mpg-cycles  || Decimals<br>0 - 65535 || Set initial speed for VU1 Micro-programs. 100 is the default value. If VU1 requirements were a bottleneck, increasing it will result in better performance while decreasing it will result in the opposite. Increasing it can be beneficial for MTVU sensitive games.|| --vu1-mpg-cycles=1000<br><pre> Symbols (They change values close to VU1-mpg-cycles' offset):

 

 

 

| --vu1-di-bits || 0, 1 || 0 Skips setting invalid, and Divides by zero flags in status register. Can be used as a speedhack as it can skip costly calculations. But at the same time, it can cause issues such as broken geometry. || --vu1-di-bits=0

| --vu1-const-prop || 0, 1|| Enabled by default. 0 will disable it and cause performance issues but with higher compatability.[https://github.com/PCSX2/pcsx2/blob/58f5a5b915915293b90e7e8f34c33f9c0424d1e8/pcsx2/x86/microVU_Misc.h#L312 More info] || --vu1-const-prop=1

| --vu1-opt-flags || 0, 1, 2 || Optimize flags upon recompilation (1 is safe, 2 update sticky, and mac flag on every status flag update) [https://github.com/PCSX2/pcsx2/blob/58f5a5b915915293b90e7e8f34c33f9c0424d1e8/pcsx2/x86/microVU_Misc.h#L280 More Info] || --vu1-opt-flags=0

| --vu1-jr-cache-policy || newprog, sameprog, auto, new, same || PCSX2 uses newprog as the default setting. Setting it into newprog has been proven to fix some crashes [https://github.com/PCSX2/pcsx2/blob/58f5a5b915915293b90e7e8f34c33f9c0424d1e8/pcsx2/x86/microVU_Misc.h#L319 Info] || --vu1-jr-cache-policy=newprog

| --vu1-jalr-cache-policy || newprog, sameprog, auto, new, same || PCSX2 uses newprog as the default setting. Setting it into newprog has been proven to fix some crashes [https://github.com/PCSX2/pcsx2/blob/58f5a5b915915293b90e7e8f34c33f9c0424d1e8/pcsx2/x86/microVU_Misc.h#L319 Info] || --vu1-jalr-cache-policy=newprog

| --vu1 || jit-sync ||  Selector between IR/JIT and it modes. Jit-sync works similarly to disabling MTVU. jit, trans, and jit-async are unimplemented functions that do not change anything. || --vu1=jit-sync

| --vu1-no-clamping ||  0,1 || Changes the clamping behavior of the VU1. Setting specific to ps4 emulators, unimplemented in pcsx2, with 0 being closest to extra, and 1 to extra + preserve sign. The default emulator's value is 1. || --vu1-no-clamping=0

| --vu1-clamp-range || vu1 memory offset start,end (0x0 - 0x7FF) || Values must not exceed 0x7FF ||

| --vu1-accurate-addsub-range || vu1 memory offset start,end (0x0 - 0x7FF) ||  Allows the VU1 to accurately add/subtract in the specified ee memory range by using software floats rather than hardware floats.|| --vu1-accurate-addsub-range=0x0000,0x0600

| --vu1-mul0fix-range || vu1 memory offset start,end (0x0 - 0x7FF) || Allows the VU1 to accurately multiply by 0 in the specified ee memory range by using software floats rather than hardware floats. || --vu1-mul0fix-range=0x123,0x123

| --vu1-native-patch || 0, 1 || Use native patches from recompiler, not compatible with jak emus. Sony uses it for their official release of Primal|| --vu1-native-patch=1

| --vu1-use-rcp || 0, 1 || Use SSE/AVX RCP. Speedhack. Likely used only in EFU pipeline, due to rare use, its really not worth to enable it. Speed improvement will be marginally/unnoticeable. Disabled by default ||

| --vu1-use-rsqrt || 0, 1 || Use SSE/AVX rsqrt instead of doing sqrt and then div. Speedhack, rather safe to use on VU1. ||

| --vu1-clamp-operands || 0, 1 || Clamp operands before mathematical operation. || --vu1-clamp-operands=1

| --vu1-clamp-results || 0, 1 || Clamp result after mathematical operation. || --vu1-clamp-results=1

| --assert-path1-ad || 0, 1 || Path 1 is how the GIF takes data from VU1 via XGKICK instruction. It's unknown what this command does but it's related to VU1, and helps prevent crashes in VU1 sensitive games when enabled. || --assert-path1-ad=1

<pre>VU0 is the Emotion Engine’s alternate processing unit. It is sometimes referred to as "micro-mode". Commands here prevent crashes, and fix SPS (graphical glitches).</pre>

| --vu0-mpg-cycles || Decimals<br>0 - 65535 || Set initial cycle speed for VU0 Micro-programs. 100 is the default value. It is not available in older emulators such as War of the Monsters. Raising the value helps COP2 timing, while lowering does the opposite.|| --vu0-mpg-cycles=1000<br><pre> Symbols (They change values close to VU0-mpg-cycles' offset):

 

 

 

| --vu0-opt-flags  || 0, 1, 2 || Optimize flags upon recompilation (1 is safe, 2 update sticky, and mac flag on every status flag update) [https://github.com/PCSX2/pcsx2/blob/58f5a5b915915293b90e7e8f34c33f9c0424d1e8/pcsx2/x86/microVU_Misc.h#L280 More Info] || --vu0-opt-flags=1

| --vu0-jr-cache-policy || newprog, sameprog, auto, new, same || PCSX2 uses newprog as the default setting [https://github.com/PCSX2/pcsx2/blob/58f5a5b915915293b90e7e8f34c33f9c0424d1e8/pcsx2/x86/microVU_Misc.h#L319 Info] || --vu0-jr-cache-policy=sameprog

| --vu0-jalr-cache-policy || newprog, sameprog, auto, new, same || PCSX2 uses newprog as the default setting [https://github.com/PCSX2/pcsx2/blob/58f5a5b915915293b90e7e8f34c33f9c0424d1e8/pcsx2/x86/microVU_Misc.h#L319 Info] || --vu0-jalr-cache-policy=sameprog

| --vu0-clamp-range || start, end offset (0x0 - 0x1FF) || per range clamping for VU0 || --vu0-clamp-range=0x100,0x120

| --vu0-no-clamping || 0,1 || Changes the clamping behavior of the VU0. Setting specific to ps4 emulators, unimplemented in pcsx2. The default emulator's value is 1. || --vu0-no-clamping=0

| --vu0-accurate-addsub-range || offset (0x0 - 0x1FF) ||Allows the VU0 to accurately Add/Subtract in the specified ee memory range by using software floats rather than hardware floats.||  

| --vu0-mul0fix-range || vu0 memory offset start,end (0x0 - 0x1FF) || Allows the VU0 to accurately Multiply by 0 in the specified ee memory range by using software floats rather than hardware floats ||

| --vu0-injection || 0, 1 || Unknown usage. || --vu0-injection=1

| --vu0-use-rcp  || 0, 1 || Use SSE/AVX RCP. Speedhack. Not sure why it is even available for VU0. Disabled by default || --vu0-use-rcp=1

| --vu0-use-rsqrt || 0, 1 || Use SSE/AVX rsqrt instead of doing sqrt and then div. Speedhack, rather unsafe to use on VU0. || --vu0-use-rsqrt=1

| --vu0-clamp-operands  || 0, 1 || Clamp operands before mathematical operation. || --vu0-clamp-operands=1

| --vu0-clamp-results  || 0, 1 || Clamp result after mathematical operation. || --vu0-clamp-results=1

<pre>The VIF decompresses vector data, uploads microprograms to the VUs, and sends graphical data to the GIF. Its commands

are often used to fix freezing.</pre>

| --vif-thread-chunk-size || 0, 1024 || Slows down both VIFS the lower it is, and speeds them up the higher it is. 1024 is the limit, with 112 being the default value.  ||  --vif-thread-chunk-size=100  

| --vif1-ignore-cmd-ints || 0, 1 ||  Set to 1 to ignore command interrupt bit. ([https://psi-rockin.github.io/ps2tek/#vifcommands info] , explanation of int bit is right before command list). Can in some cases fix games that freeze while showing the same frame if set to 1. Games likes "Men in Black II - Alien Escape" and "Test Drive Unlimited" Will always need it. || --vif1-ignore-cmd-ints=1

| --vif1-instant-xfer ||  1 = Instant VIF1<br>0 = Delayed VIF1 || Changes VIF1 timing. 0 slows its timing and is the compatible option for most games, while 1 speeds up its timing, and being more compatible with a small fraction of games. It can be used to fix graphical glitches or potentially prevent games from freezing. || --vif1-instant-xfer=0

| --iop-sif1-cycle-scalar || Accelerate SIF cycles: (0.99 => 0.1)<br>Decelerate SIF cycles: (1.1 => ∞ )|| Controls the speed at which the IOP receives from the EE || --iop-sif1-cycle-scalar=0.1

| --ee-sif1-cycle-scalar ||Accelerate SIF cycles: (0.99 => 0.1)<br>Decelerate SIF cycles: (1.1 => ∞ )|| Controls the speed at which the EE sends to the IOP || --ee-sif1-cycle-scalar=0.1

| --iop-sif0-cycle-scalar || Accelerate SIF cycles: (0.99 => 0.1)<br>Decelerate SIF cycles: (1.1 => ∞ )|| Controls the speed at which the IOP sends to the EE || --iop-sif0-cycle-scalar=0.1

| --ee-sif0-cycle-scalar || Accelerate SIF cycles: (0.99 => 0.1)<br>Decelerate SIF cycles: (1.1 => ∞ )|| Controls the speed at which the EE receives from the IOP || --ee-sif0-cycle-scalar=0.1

====[https://www.psdevwiki.com/ps2/Graphics_Synthesizer GS]====

| --gs-adaptive-frameskip || 0, 1 || Speedhack. Skips frames when the gs demands more resources than there are available. doesn't work on all emulators.  It does however, work on jak emulators || --gs-adaptive-frameskip=1

| --gs-h2l-list-opt || 0, 1 || Setting it to 1 improves GS performance||--gs-h2l-list-opt=1

|-style="background-color:#cbddfb"

| || GS features || ||

| --gs-uprender || none,2x2 || Internal resolution upscaler. || --gs-uprender=2x2

| --gs-kernel-cl-up || "DarkCloud2" "fantavision" "h2lpool2x2", "OptRightTri", "clutmerge2x2", "mipmap2x2", "up2x2simple", "up2x2skipinterp", "up2x2tc", "up2x2", default || Kernel Variant Color lookup Upscaler (?), mipmap and clutmerge and h2l need to be enabled before their options become usable|| --gs-kernel-cl-up="clutmerge2x2"

| --gs-override-small-tri-area || 0, 1 || This option is designed to modify how the emulator handles or renders small triangles that fall below a certain area threshold. Enabling this option could resolve graphical problems such as missing, flickering, or incorrectly rendered small details, and could potentially restore missing text in some games. || --gs-override-small-tri-area=1

| --gs-dirty-page-policy || 0, 1 || Unknown. Used by Star Wars: Jedi Starfighter || --gs-dirty-page-policy=1

| --gs-ignore-dirty-page-border || 0, 1 || Unknown. Used by Samurai Shodown Anthology ||--gs-ignore-dirty-page-border=1

| --gs-ignore-rect-correction || 0, 1 || Setting it to 1 is known to fix flickering textures and graphical glitches in far distances. || --gs-ignore-rect-correction=1

| --gs-opt-frbuff-switch || 0, 1 ||  Unknown. Used by Everybody's Tennis/Hot Shots Tennis || --gs-opt-frbuff-switch=0

| --gs-kernel-cl || h2lpool, clutmerge, mipmap, DarkCloud2, fantavision, Mipmap and clutmerge and h2l need to be enabled before their options become usable ||Kernel Variant Color lookup(?). Options included here can be upscaling if --gs-kernel-cl-up were to be used along with it || --gs-kernel-cl="clutmerge"

| --gs-progressive || 0, 1 || Enables progressive scan. Can fix graphical glitches/double screen issues. ||

| --gs-vert-precision || 8, 16 || This option allows the user to choose between 8-bit and 16-bit precision for the vertex calculations in 3D graphics rendering. It reduces the likelihood of visual distortions such as jagged edges, improper alignment of polygons, or model "warping." The emu expects the values of 8 or 16, any other values are not permitted. || --gs-vert-precision=8

| --gs-skip-dirty-flush-on-mipmap || 0, 1 || Skip flushing textures marked as dirty from cache when enabled. It does, however, require mipmap to be enabled first. || --gs-skip-dirty-flush-on-mipmap=1

| --gs-packed15-fmv-opt || 0, 1 || Unknown. This option likely controls whether the emulator optimizes or processes FMVs that use the 15-bit packed color format. Used by Ape Escape 2|| --gs-packed15-fmv-opt=1

| --gs-fieldswap-delay || 0, 254 || Wait longer than usual to change field. In essence, it blurs/sharpens image. ||

| --gs-render-tile-threshold || 0, 3000000 || Unknown. Used by Psychonauts|| --gs-render-tile-threshold=300000

| --gs-frontend-opt-mode || 0, 1, 2 || GS optimization mode? Unknown effect. Used on JakX || --gs-frontend-opt-mode=1

| --gs-motion-factor || 25, 50 ||  Unknown. Used by Wild ARMS 3|| --gs-motion-factor=25

| --gs-check-trans-rejection || 0, 1  || Check transfer rejection? Unknown. Used by Grand Theft Auto: Vice City || --gs-check-trans-rejection=1

| --gs-check-trans-rejection68 || 0, 1 || Unknown. Used by Star Wars: Jedi Starfighter || --gs-check-trans-rejection68=1

| --gs-h2l-accurate-hash || 0, 1 || ||--gs-h2l-accurate-hash=1

| --safe-area-min || area/float (range 0.9 to 1.0) any other values outside of that range will be rejected by the emulator || An overscan setting|| --safe-area-min=0.9

|-

<pre>The emulated I/O Processor (IOP) settings. Commands here are rarely useful, as very few games will require them. The IOP controls the emulated DEV9, SPU2, USB, Memory cards, CDVD, Firewire, along with other input/output devices</pre>

| --iop-cycle-scalar ||<br>Accelerate IOP cycles: (0.999 => 0.100)<br>Decelerate IOP cycles: (1.001 => 5.000)|| '''Not a performance speedhack'''. It impacts the speed of loading times and input latency. The default value for most emulators is 0.5|| --iop-cycle-scalar=1.0

| --iop-tight-slice-count || 0, 2000 || Seems to slow down the iop the higher the value. Can be used to fix CDVD timing issues. || --iop-tight-slice-count=12

| --iop-hook || AdvanceClock<br>FastForwardClock<br>Mfifodrain || IOP native hook, Sony uses it on their official release of Red dead revolver. It helps fix timing issues || --iop-hook=0x0086ac,FastForwardClock

| --iop-block-validation || IsC, ShortHash, Hash || Way of validating that block been modified, and require recompilation. Other Possible values include PageProt, None, PageProtection || --iop-block-validation=IsC

| --detect-idle-iop || 0, 1 || Enabled by default. || --detect-idle-iop=0

====CDVD====

 

! Command !! Values !! Notes !! Usage  

 

 

| --idec-cycles-per-qwc || int/multiplier || Multiply how many cycles IDEC command take per whole currently worked on QWC. || --idec-cycles-per-qwc=768

| --pcr0-delta-hack || 0.1 , 400000.0 || Modify delta of pcr0 when reading it from MFC0. Some games rely on good performance counters accuracy (Spyro ANB cutscenes), and since emulator don't implement most events, hack it is. || --pcr0-delta-hack=1.0

| --jitproc-use-aslr || || Disables compiler process ASLR, useful for easier debugging, as the compiler process will be always on fixed address. Theoretically useful for mast1c0re, but to change it you need to be already in... || --jitproc-use-aslr=0

| --detect-idle-intc ||0, 1|| Enabled by default, 0 disables it || --detect-idle-intc=0

| --detect-idle-chcr|| 0, 1|| Enabled by default, 0 disables it || --detect-idle-chcr=0

==== PCSX2's gameindex ====

 

<pre>PCSX2's commands on the PS4 (or the commands which behave similarly)</pre>

! {{cellcolors|#00d6f2|#000000}}PCSX2 !! {{cellcolors|#38ffc3|#000000}}PS4 !! Notes

| {{cellcolors|#0b9fb3|#000000}}XGKickHack ||{{cellcolors|#03fcb1|#000000}}--vu-xgkick-delay= || Possible equivalent value is 8

| {{cellcolors|#0b9fb3|#000000}}VuAddSubHack ||{{cellcolors|#03fcb1|#000000}}--vu-hack-triace=1 || Required for every single game developed by TriAce

| {{cellcolors|#0b9fb3|#000000}}vuClampMode: 2 ||{{cellcolors|#03fcb1|#000000}}<br>--vu1-no-clamping=0<br>--vu0-no-clamping=0<br>--cop2-no-clamping=0  ||

| {{cellcolors|#0b9fb3|#000000}}vuClampMode: 3  || {{cellcolors|#03fcb1|#000000}}<br>--vu1-no-clamping=1<br>--vu0-no-clamping=1<br>--cop2-no-clamping=1<br>--vu-to-double=1 ||

| {{cellcolors|#0b9fb3|#000000}}eeClampMode: 2 || {{cellcolors|#03fcb1|#000000}}--fpu-to-double=0<br>--fpu-no-clamping=0<br> ||

| {{cellcolors|#0b9fb3|#000000}}eeClampMode: 3  || {{cellcolors|#03fcb1|#000000}}--fpu-to-double=1<br>--fpu-no-clamping=1<br> ||

| {{cellcolors|#0b9fb3|#000000}}eeRoundMode: || {{cellcolors|#03fcb1|#000000}}--fpu-accurate-muldiv=1<br>--fpu-accurate-addsub=1 ||

| {{cellcolors|#0b9fb3|#000000}}vu0RoundMode: || {{cellcolors|#03fcb1|#000000}}--cop2-accurate-mul=1<br>--cop2-accurate-addsub=1<br>--vu0-accurate-addsub-range=<br>--vu0-mul0fix-range= ||

| {{cellcolors|#0b9fb3|#000000}}vu1RoundMode: || {{cellcolors|#03fcb1|#000000}}--vu1-accurate-addsub-range=<br>--vu1-mul0fix-range=||

| {{cellcolors|#0b9fb3|#000000}}eeCycleRate: || {{cellcolors|#03fcb1|#000000}}--ee-cycle-scalar= || '''"Potential" equivalent values: PCSX2 - PS4''':<br>300% --> 0.333<br>180% --> 0.555<br>130% -->0.769<br>'''100% --> 1.0'''<br>75% --> 1.333<br>60% --> 1.666<br>50% --> 2

| {{cellcolors|#0b9fb3|#000000}}FpuNegDivHack<br>FpuMulHack || {{cellcolors|#03fcb1|#000000}}--fpu-accurate-muldiv=1 ||  

| {{cellcolors|#0b9fb3|#000000}}cpuCLUTRender: 1 || {{cellcolors|#03fcb1|#000000}}--gs-uv-shift-pointsampling=1 ||

| {{cellcolors|#0b9fb3|#000000}}MTVUSpeedHack: 0 || {{cellcolors|#03fcb1|#000000}}--vu1=jit-sync || Some games will also require --vu1-mpg-cycles= to be between "6000 - 19000"

| {{cellcolors|#0b9fb3|#000000}}mergeSprite<br>alignSprite || {{cellcolors|#03fcb1|#000000}}--gs-kernel-cl-up="up2x2simple" || Note: works similarly but not the equivalent

| {{cellcolors|#0b9fb3|#000000}}cpuSpriteRenderBW: 4 || {{cellcolors|#03fcb1|#000000}}--gs-opt-frbuff-switch=1 || Note: works similarly but not the equivalent

| {{cellcolors|#0b9fb3|#000000}}mipmap || {{cellcolors|#03fcb1|#000000}}--gs-use-mipmap=1<br>--gs-kernel-cl="mipmap" || Note: Works best on War of the Monsters emu

| {{cellcolors|#0b9fb3|#000000}}autoFlush || {{cellcolors|#03fcb1|#000000}}--gs-flush-ad-xyz=safe || Possible values include always, safe, off, 0

| {{cellcolors|#0b9fb3|#000000}}VIF1StallHack || {{cellcolors|#03fcb1|#000000}}--vif1-instant-xfer=0 ||  If that doesn't work, the lua command eeObj.SchedulerDelayEvent("vif1.dma", 0x9000) might assist.

| {{cellcolors|#0b9fb3|#000000}}wildArmsHack || {{cellcolors|#03fcb1|#000000}}--gs-kernel-cl-up="DarkCloud2" ||

| {{cellcolors|#0b9fb3|#000000}}deinterlace || {{cellcolors|#03fcb1|#000000}}--force-frame-blend=1 ||

 

Every PS2 emulator is programmed differently. Sometimes choosing the right emulator is the only way to fix a game. Emulators are not provided pre-installed in the PS4 OS, but instead they have to be unpacked from an official PS2 CLASSICS PKG file signed by Sony. This list includes the typical usage of those emulators.

 

! Emulator name !! Typical usage - Info !! API Version !! Similar emulators

| The King of Fighters '98: Ultimate Match || The only known emulator where '''Mojin-ribbon''' is playable. Commonly known as "KOF98"|| 2.0 ||

| Jak and Daxter: The Precursor Legacy || Good compatibility with most ps2 games. It has a very high api version which means more LUA commands are supported. In addition, Jak emus are one of the few emus that can use the '''--gs-adaptive-frameskip=1''' command. It is often referred to as "Jak v2"|| 2.2 || '''JakX,''' '''Jak 2,''' '''Jak 3,'''  

| Art of Fighting Anthology || Similar to RECVX. It was successful in fixing "'''Coraline'''." Sometimes called "AOFA" || 2.0 ||

| Resident Evil - Code: Veronica || Fixes games like '''Jackie chan Adventures, SpongeBob SquarePants: Creature From the Krust Krab, Pac-man World 3, Yu-Gi-Oh: Capsule monsters, SpongeBob's Atlantis SquarePantis''' freezing at a black/splash screen. Additionally, it fixes many games requiring '''OPL's mode 2'''. Often referred to as "RECVX" || 1.7 || '''Fatal Fury,''' '''Redfaction,''' '''AOFA.'''

| Red Faction || It is prominently used to fix VU1 sensitive games. It was used to fix '''Tony Hawk games''' suddenly crashing, as well as MTVU sensitive games such as '''Star Wars Battlefront II'''.|| 1.6 || '''Max payne'''  

| Forbidden Siren || The only emulator to fix '''Ice age 2''' being stuck at splash screen. It also fixed '''Gran turismo 4''' running abysmally slow. || 0.1 ||

| King of Fighters 2000 || Seemingly one of the most VU-accurate emus, fixing sps in games such as '''Crash Twinsanity''', '''Rayman 3''', '''Crazy Frog Racer'''. It also '''prevents Koei tecmo games from suddenly freezing when battle starts. Moreover, it is likely the only emulator where '''Batman Begins''' does not crash.''' Often referred to as "KOF2000"|| 1.2 || '''Roguev1''', '''KOF98''', '''Okage'''

| Destroy All Humans! || Fixed '''Tenchu: Fatal Shadows'''' crashing. || 0.1 ||  

| Rise of the Kasai || It fixed most of the '''Harry Potter''' games. Often referred to as "rotk". || 0.2 ||

|War of the monsters v1 || Subjectively the best emulator to use. Used as PS2CLASSICSGUI's default emulator, it is the best one around for accurate gs emulation, as some graphical issues on the Ratchet series and Tekken 5 can only be fixed by it. Another interesting case is GTA SA's lack of need for auto flush on it, and being natively performant. Additionally, its VU0 timing is much better than Jakv2's, making it one of the best emulators on the PS4. || 0.1 || '''Rogue v1 and v2, Arc the Lad, Star Wars Jedi Starfighter'''

| GTA III || Fixed the PAL version of '''Genji: Dawn of the Samurai'''. || 0.6 ||

| PaRappa the Rapper 2 || The only emulator to boot '''Spyro: A Hero's Tail'''. || 0.1 ||

| Star Wars Racers Revenge || Seemingly the closest emulator to the PS3's. Useful for debugging games as it also shows useful information such as pagefault. || 0.4 ||  

<br>It is the most powerful configuration on the emulator, it allows for direct patching of EE/IOP/VU memory, hooks registers, hook dma. Almost Everything can be done here.  

<br>If needed it can hook registers by using register names from alias files. Alias files (ee-cpr0-alias.lua, ee-gpr-alias.lua, ee-hwaddr.lua) are stored in lua_include folder, and can be included to config by using require ("alias file name").  

<br>'''Known functions:  

 

==== ApiRequest ====

 

<pre>The most important part of the LUA script. The LUA script will crash the game if used without it.</pre>

 

===== (Emulator) EmuObject =====

 

|ThrottleMax || emuObj.ThrottleMax() || Disable framelimiter during loading screens.  

|ShowDiscSwitchInfo || emuObj.ShowDiscSwitchInfo() ||

|LoadConfig || emuObj.LoadConfig( 0 or 1 )|| emuObj.LoadConfig(0)

|SaveConfig || emuObj.LoadConfig( 0 or 1 ) || emuObj.LoadConfig(0)

| SetPs2Lang || emuObj.SetPs2Lang(<Lang ID>) || Set emulated PS2 language, correct Lang IDs are 0-18. In some cases, games will hang on a black screen with some other language settings (eg Japanese) - Example for usage: emuObj.SetPs2Lang(1)

|PadSetLightBar || emuObj.PadSetLightBar(<port, red, green, blue>) || Set DS4 light bar color. The correct port values are 0-3, correct light values are 0-255.

===== (EE) EEObject =====

 

|ReplaceMem32 || eeObj.ReplaceMem32(<address>, <value>) || Permanently replace an offset without needing addvsynchook?

|GetPc || eeObj.GetPc() ||This command is very helpful as it will return to you the current EE address that's being read. Can be used also with additional var. like eeObj.GetPc()+4

| AddHookJT || eeObj.AddHookJT(Offset, offset opcode, function) || Seems be a hook related to the jit

|FastForwardClock || eeObj.FastForwardClock() || Skip Emotion Engine cycles?

|AdvanceClock || eeObj.AdvanceClock() || Likely skips an allocated amount of EE cycles.

eeObj.AddHook(0x002cc350, 0x78a30000, function()

          eeObj.AdvanceClock(21000)

| GetClock || eeObj.GetClock() || Returns the value of how many cycles the EE is ahead of normal clock (?)

|SchedulerDelayEvent || eeObj.SchedulerDelayEvent("event", cycles)<br>Example:<br>eeObj.AddHook(0x0033A4DC,0xAC430000, function() eeObj.SchedulerDelayEvent("gif.dma", 0x10500) end) || Parrapa use eeObj.SchedulerDelayEvent("vif1.dma", 0x6500) other events are gif.dma, vif0.dma, vif1.dma, sif0.dma, Sif0-NormalTransfer, sif1.dma, Sif1-NormalTransfer, ipu0.dma, ipu1.dma . This command allows for the delayment of certain DMA transfer by cycles.  

| GetVif1Cycles || eeObj.GetVif1Cycles() || local vif1_cycles = eeObj.GetVif1Cycles() create vif_cycles value that can be used later. You can rename it as you wish.

====== SetGsTitleFix ======

 

<pre>One of the most important LUA commands. It modifies the Graphics Synthesizer's behavior.

 

Part of EmuObject() class, it's frequently used in official configs.</pre>

local thresholdArea = 0 -- ignore alls items : fix #112276

emuObj.SetGsTitleFix( "ignoreUpRender", thresholdArea , {  texType = 3, cbp = 0x2390, tbp = 0x288000} )

emuObj.SetGsTitleFix( "ignoreUpShiftTri", "reserved" , { fbmask = 0x00FFFFFF  } )

-- Performance  fix ( bug# 9474 )

if 0 then  -- emuObj.IsNeoMode() then -- neo mode check disabled, due to bug #10442

    emuObj.SetGsTitleFix( "globalSet", "reserved", { workLoadThreshold = 125000} )

    emuObj.SetGsTitleFix( "globalSet", "reserved", { workLoadThreshold = 100000} )

------------------------------------------------------------------------------------------------------

-- bug# 9972

emuObj.SetGsTitleFix( "ignoreSubBuffCov", "reserved", { } )

-- Bully bug 9392

emuObj.SetGsTitleFix( "ignoreUpRender", thresholdArea , {alpha=0x80000044 , zmsk=1 , tw=4, th=4  } )

------------------------------------------------------------------------------------------------------

emuObj.SetGsTitleFix( "ignoreSubBuffCov", "reserved", { } )

------------------------------------------------------------------------------------------------------

-- Bug#9240 (Light maps uprender)

-- Copy z-buffer for future use with light maps. psm = SCE_GS_PSMZ24 (49)

emuObj.SetGsTitleFix( "forceSimpleFetch", "reserved", {tw=9, th=9, psm=49, zmsk=1 } )

------------------------------------------------------------------------------------------------------

-- Apply light maps texMode=2 (bilinear)   psm= SCE_GS_PSMCT32 (0)

emuObj.SetGsTitleFix( "forceSimpleFetch", "reserved", {tw=8, th=8, psm=0, ztst=1, texMode=2 } )

------------------------------------------------------------------------------------------------------

emuObj.SetGsTitleFix( "globalSet", "reserved", { waveThreshold = 90000} )

emuObj.SetGsTitleFix( "ignoreAreaUpdate", 0, { } )

------------------------------------------------------------------------------------------------------

emuObj.SetGsTitleFix( "includeAreaUpdate", "reserved" , {alphaIsNot = 0, zmsk = 1, tw = 6, th = 6 , tbp = 0x00302000} )

emuObj.SetGsTitleFix( "ignoreUpRender", 130 , { totalArea= 700} )

------------------------------------------------------------------------------------------------------

emuObj.SetGsTitleFix( "forceSimpleFetch", "reserved", { texMode=1  } )

------------------------------------------------------------------------------------------------------

emuObj.SetGsTitleFix( "SetSelfRender", "reserved", { fbmask= 0x00FFFFFF , renderSelf=1 , zmsk=1 , alpha=0 , texMode=1  } )

------------------------------------------------------------------------------------------------------

emuObj.SetGsTitleFix( "ignoreSprite", "reserved", {  texType=1 , tw=5 , th=8, zmsk=1 , alpha=0x80000044 } )

------------------------------------------------------------------------------------------------------

emuObj.SetGsTitleFix( "setRejectionArea", 500,{twIsNot=8, thIsNot=8 } )

------------------------------------------------------------------------------------------------------

-- Set triangle rejection area= 1000  when alpha blend is not 0 ( i.e blend is On)

emuObj.SetGsTitleFix( "setRejectionArea", 1000, {alphaIsNot=0 } )

emuObj.SetGsTitleFix( "ignoreUpRender", thresholdArea , {alpha=0x80008068 , zmsk=1 } )

emuObj.SetGsTitleFix( "ignoreUpRender", thresholdArea , {alpha=0x80000044 , zmsk=1 } )

-- Disable uprender on the draw command which samples the framebuffer (0x3200) using bilinear sampling (texMode=2)

-- All lighting effects use TriFan prim type, so use that as well to filter against.

emuObj.SetGsTitleFix( "forceSimpleFetch", "reserved", {prim=5, texMode=2, tbp=0x320000} )

</pre>

 

{| cellspacing="0" cellpadding="2" border="1" class="wikitable" style="text-align: center;"

|globalSet || emuObj.SetGsTitleFix( "globalSet",  "reserved", { packedRegsLo = 0x42,packedRegsHi = 0, packedRegsNum = 2, packedFlags = 3, packedPrim = 5}) || used with workLoadThreshold or  waveThreshold or loadThreshold

|reserved || ||

|ignoreSubBuffCov|| ||ignore ? buffer coverage

|ignoreUpRenderTimeout|| emuObj.SetGsTitleFix( "globalSet", "reserved", {ignoreUpRenderTimeout=2} ) ||

|ignoreAreaUpdate|| emuObj.SetGsTitleFix( "ignoreAreaUpdate", 0, { alpha=0x80000048 } ) ||

|ignoreSprite|| emuObj.SetGsTitleFix( "ignoreSprite", "reserved", {  texType=1 , tw=5 , th=8, zmsk=1 , alpha=0x80000044  } ) ||

|ignoreUpShiftTri|| emuObj.SetGsTitleFix( "ignoreUpShiftTri", "reserved", {psm=0} ) ||

|clipScissors|| emuObj.SetGsTitleFix( "clipScissors", "reserved", {alpha = 0 , frameW = 4 , psm = 0} ) ||

|trianglesAsParticles|| emuObj.SetGsTitleFix( "trianglesAsParticles", "reserved", { hasClut=1,zmsk=1 } ) ||

|SetSelfRender|| emuObj.SetGsTitleFix( "SetSelfRender", "reserved", { fbmask= 0x00FFFFFF , renderSelf=1 , zmsk=1 , alpha=0 , texMode=1  } ) ||

|forceBiLinear || ||

|forcePoint|| emuObj.SetGsTitleFix( "forcePoint", "reserved", {mipIsGt=0, mmin=0} ) ||

|forceSimpleFetch ||   emuObj.SetGsTitleFix( "forceSimpleFetch",  "reserved", {psm=0} ) ||Used frequently to fix graphical corruptions

|forcePointSampling|| emuObj.SetGsTitleFix( "forcePointSampling", "reserved", {alpha = 0x80000048, twIsLess=5, thIsLess=5 } ) ||

|setRejectionArea|| emuObj.SetGsTitleFix( "setRejectionArea", 1000, { } ) ||

|ignoreUpRender|| emuObj.SetGsTitleFix( "ignoreUpRender", thresholdArea , {  texType = 3, cbp = 0x2390, tbp = 0x288000} ) || Ignore uprender for texture type described in params

|includeAreaUpdate|| ||

|fetchFromCurrBuff|| emuObj.SetGsTitleFix( "fetchFromCurrBuff", "reserved", {psm=0} ) ||

|changeAlpha|| ||

<br>'''Arguments/variables'''

! Argument !! Usage !! Notes

|-style="background-color:#7698FF"

|  || Variable ||