Talk:PS2 Emulation
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TODO: Please remove unneeded uppercase letters not at the start of sentences.
- This Is Not Elon Musk Here :P - Roxanne
Regs
- 1040000000 VU1 regs, mapping like on VU0.
- 1050000000 VU1 micro data memory (1100C000 on real ps2 and pcsx2 debugger) size 0x4000.
- 1050004000 VU1 micro data memory mirror (1100C000 on real ps2 and pcsx2 debugger) size 0x4000. Likely mirrored 2 more times on 8000 and c000
- 104000C000 emulator place here VU1 constants used in popular operations. Eatan/eexp constants, masks for clamping, etc. Similar array can be found in Pcsx2 (mVU_Globals), Dobiestation (atan_const, etc), Play! (GenerateEATAN, etc.)
- 1030004000 emulator place here VU0 constants used in popular operations. Like above (vu0 don't have efu so placing there efu constants for eatan/eexp is pointless, but there they are).
--Kozarovv (talk) 09:37, 5 January 2023 (UTC)
Misc info
Some data that eventually need to be posted on main emulation page. All data posted here is obtained from jak tpl (so called v1) emulator. All data is confirmed in code itself, no guessing (unless said otherwise). Time to start releasing that old work to public.
- Settings ignored by emulator (there is more than that): https://pastebin.com/Hm9bfnF6
- Settings which use bool (0/1, emu accept true/false on/off too) as value: https://pastebin.com/iaLLAXHn
- Settings which use double float as value: https://pastebin.com/cZvxCb6K (unk max values are likely DBL_MAX )
- Default VU1 settings used by Jak TPL emu: https://pastebin.com/tDsTNWFH
- Default VU0 settings used by Jak TPL emu: https://pastebin.com/iSEngpJh
- Default VU settings used by Jak TPL emu: https://pastebin.com/NL8Vae1b
- Default IOP settings used by Jak TPL emu: https://pastebin.com/9K4dk6vb
- Default FPU settings used by Jak TPL emu: https://pastebin.com/YrF7fBT5
- Default EE settings used by Jak TPL emu: https://pastebin.com/SBXimZhc (awesome formatting pastebin, good job)
- Default COP2 settings used by Jak TPL emu: https://pastebin.com/aG0LDryy
- Default misc settings used by Jak TPL emu: https://pastebin.com/79JCRXkq (ps2_lang is changed later if host system match possible ps2 languages)
Misc misc info
- Both settings do the same thing:
--external-hdd-fix --cdvd-determinism
--ee-kernel-hle --ee-injection-kernel
- Setting take unused value:
--ee-cache-breaks-block No matter which value is used, 1 is set.
Few popular misunderstandings
- vu-xgkick-delay take integer between 0-31 (confirmed on both emu and compiler side), and not float (0.5 is invalid, will be truncated to 0 probably)
- Cop2 rounding in pcsx2 is governed by "EE/FPU" rounding setting, not by VU or VU0.
- Cop2 clamping is hardcodded in pcsx2 as far as i know, if no then is likely also governed by EE/FPU setting not VU/VU0
- xx-no-clamping setting is not really no clamping known from pcsx2. This is special mode which can be used regardless of other clamp commands. To compare pcsx2 have similar mode only for FPU (Full), to fully mimic that mode we still need fpu-to-double enabled.
ee-native-function
Emulator have set of predefined functions used in popular PS2 SDK libraries. Those function are highly optimized to run natively on x64.
--ee-native-function=name,address under the hood this is hooking selected address, and replace it with jump to predefined function. Functions available in JAK TPL emu:
memset | fptoui | ieee754_sinf memcpy | fptodp | ieee754_cosf strlen | dptofp | ieee754_sqrtf strcmp | fabs | asinf strcasecmp | fabsf | acosf litodp | ieee754_atan2f | sinf dptoli | ieee754_asinf | cosf floatdidf | ieee754_acosf | sqrtf
This drastically reduce emitted code size for selected function. Additionally there is no need to recompile that at all, emulator just emit jump to label, and that's all. Additionally emulator advance delta clock to compensate cycles which will be normally took by original function.
Example ee_native_floatdidf
vcvtsi2sd xmm0, xmm0, rdi vmovq rax, xmm0 retn
This is what real floatdidf looks like originally in ps2 mips, you can imagine that recompiled x64 code will be much longer. Every single instruction will be translated/recompiled separately.
addiu $sp, -0x30 sd $s0, 0x20+saved_s0($sp) move $s0, $a0 sd $s1, 0x20+saved_s1($sp) li $s1, 0x81E0 dsll32 $s1, 15 dsra32 $a0, $s0, 0 sd $ra, 0x20+saved_ra($sp) jal litodp nop move $a1, $s1 jal dpmul move $a0, $v0 move $a1, $s1 jal dpmul move $a0, $v0 move $s1, $v0 lui $v0, 0xFFFF dsrl32 $v0, 0 and $s0, $v0 dsll32 $s0, 0 dsra32 $s0, 0 jal litodp move $a0, $s0 bgez $s0, loc_2F3734 move $a0, $s1 li $a1, 0x83E0 dsll32 $a1, 15 jal dpadd move $a0, $v0 move $a0, $s1 jal dpadd move $a1, $v0 ld $ra, 0x20+saved_ra($sp) ld $s1, 0x20+saved_s1($sp) ld $s0, 0x20+saved_s0($sp) jr $ra addiu $sp, 0x30
This is corner case example as floatdidf convert a 64bit signed integer to IEEE double, and PS2 developers generally had no reason to use doubles (fpu/vu are operating on 32 bit floats). But you can see that whole conversion is practically done in 1 opcode, while ps2 take massive function to do this. Other functions are usually less optimized, but still really worth it.
EE/VU injection
"Injections" are special sets of precompiled functions, idea is known better as HLE emulation. Available injections can vary depend on ps2-compiler.self, because that's where lookup for available functions is done. This literally replace code that normally is recompiler, with optimized version when address and hash match. Probably not many games can use this. Good candidates are games that use the same engine as currently released ps2 classics. Many times VU1 programs are reused by the same developer.
VU1
- Name + offset in JAK TPL compiler
- unk1
- VU1 mpg start address (divided by 8)
- Some kind of hash to ensure that correct part of microprogram gets replaced
- Many other unknown values
|______NAME_______|U|_ADDR_|______HASH?_____|U|N|K|N|O|W|N vu1_inject_1B5680, 0, 0, 354AAD4A5C5F8h, 0, 0,0, 0, 1, 0> ; DATA XREF: vu1_exec_1AD1D0+CC8↑o vu1_inject_1B5CC0, 0, 10Fh, 31BE7F0B62906DB7h,0, 0, 0, 0, 1, 0> vu1_inject_1BA950, 0, 0Fh, 0B67E7F1B32B878BDh,0, 0, 0, 0, 1, 0> vu1_inject_1BF5E0, 0, 754h, 280C4275B1928A12h,0, 0, 0, 0, 1, 0> vu1_inject_1C0290, 0, 74Ah, 8978033C72E3DCA2h,0, 0, 0, 0, 1, 0> vu1_inject_1C1080, 0, 58h, 559E11A1D3055656h, 0, 0, 0, 0, 1, 0> vu1_inject_1C09E0, 0, 49h, 0FF679F42534A3255h,0, 0, 0, 0, 1, 0> vu1_inject_1C72C0, 0, 17Eh, 52A3C65951B99CF3h,0, 0, 0, 0, 1, 0> vu1_inject_1C8840, 0, 286h, 0F6B365D47BC423C0h, 0, 0, 0, 0, 1, 0> vu1_inject_1C8A50, 0, 18Ch, 0D50B071B598E86C1h, 0, 0, 0, 0, 1, 0> vu1_inject_1C9C70, 0, 18Bh, 0D504FF9B7B8E86CFh, 0, 0, 0, 0, 1, 0> vu1_inject_1C9D40, 0, 183h, 0D886632A2396F9A4h, 0, 0, 0, 0, 1, 0> vu1_inject_1CAD20, 0, 3DDh, 36CF5FCB8AAED87Eh,0, 0, 0, 0, 1, 0> vu1_inject_1CC4F0, 0, 474h, 0D1A1E17DE3811013h, 0, 0, 0, 0, 1, 0> vu1_inject_1CCF10, 0, 96h, 2B8DB65EE593B395h, 0, 0, 0, 0, 1, 0> vu1_inject_1CE5E0, 0, 2B2h, 9E7800006C113EE5h,0, 0, 0, 0, 1, 0> vu1_inject_1CE930, 0, 0B8h, 760E33D4278BEA74h,0, 0, 0, 0, 1, 0> vu1_inject_1D0830, 0, 112h, 0DCE5CDA96EB6389Bh, 0, 0, 0, 0, 1, 0> vu1_inject_1D22E0, 0, 538h, 52561DBBF5CF1832h,0, 0, 0, 0, 1, 0> vu1_inject_1D3D80, 0, 55Ah, 1083419D800001Ch, 0, 0, 0, 0, 2, 0> vu1_inject_1D4820, 0, 549h, 0C5755531B35CC848h, 0, 0, 0, 0, 2, 0> vu1_inject_1D5300, 0, 168h, 0CAA8A8936947CFC1h, 0, 0, 0, 0, 2, 0> vu1_inject_1D8FC0, 0, 24h, 90616BE83F46B0B8h, 0, 0, 0, 0, 1, 0> vu1_inject_1DA6F0, 0, 7Fh, 3CF37762DE2DC97Ch, 0, 0, 0, 0, 2, 0> vu1_inject_1DC1B0, 0, 88h, 7004A0F767800h, 0, 0, 0, 0, 1, 0> vu1_inject_1DC1D0, 0, 0F3h, 2D4BD82E171ACD84h,0, 0, 0, 0, 2, 0> vu1_inject_1DE5C0, 0, 10Dh, 0BD8855ED4151881Ah, 0, 0, 0, 0, 2, 0> vu1_inject_1E0410, 0, 0DBh, 0F6B7D7417D0400D7h, 0, 0, 0, 0, 2, 0> vu1_inject_1E2160, 0, 10Ch, 0CFF00003408100h, 0, 0, 0, 0, 2, 0> vu1_inject_1E25E0, 0, 7FCh, 500001B028000259h,0, 0, 0, 0, 2, 0> vu1_inject_1E2A60, 0, 5ECh, 5D40E9B71E6A01A1h,0, 0, 0, 0, 2, 0> vu1_inject_1E6170, 0, 5A4h, 3917D188F40B9940h,0, 0, 0, 0, 2, 0> vu1_inject_1E8E30, 0, 16Fh, 95C2C290F7DD248h, 0, 0, 0, 0, 2, 0> vu1_inject_1ECDA0, 0, 7D3h, 7A00268978312859h,0, 0, 0, 0, 2, 0> vu1_inject_1EDBE0, 0, 5BDh, 0A9FAF30FCE438D4Bh, 0, 0, 0, 0, 2, 0> vu1_inject_1EF510, 0, 1C6h, 7C7755083564464Ch,0, 0, 0, 0, 2, 0>
EE Title
- Name used by emu
- Address in ps2-compiler memory
Please keep in mind that names can be misleading because if function can be reused for EU release, then US inject is used. This happen in Max Payne2 injects.
NAME ADDR Psychonauts_compareFunction_EMeshFrag CODE 0x12BC80 __Psychonauts_loadVUGeneralConstants_WorldClip CODE 0x12CA00 Psychonauts_loadVUGeneralConstants_WorldClip CODE 0x12CEB0 Psychonauts_loadVUGeneralConstants_ClipScreen CODE 0x12CFE0 Psychonauts_loadVUGeneralConstants_Frustrum CODE 0x12D110 GTALCS_SetMatrix CODE 0x12D670 GTALCS_sqrtf CODE 0x12DB80 GTALCS_US_0x2016b4 CODE 0x12DC80 GTALCS_US_0x201780 CODE 0x12E0E0 GTALCS_US_0x201c74 CODE 0x12E160 GTALCS_US_0x201da8 CODE 0x12E1E0 GTALCS_US_0x202a6c CODE 0x12E260 GTALCS_EU_0x2017bc CODE 0x12E2E0 GTALCS_EU_0x201888 CODE 0x12E360 GTALCS_EU_0x201d7c CODE 0x12E3E0 GTALCS_EU_0x201eb0 CODE 0x12E460 GTALCS_EU_0x202b74 CODE 0x12E4E0 GTALCS_JP_0x21e3fc CODE 0x12E560 GTALCS_JP_0x21e4c8 CODE 0x12E5E0 GTALCS_JP_0x21e9bc CODE 0x12E660 GTALCS_JP_0x21eaf0 CODE 0x12E6E0 GTALCS_JP_0x21f7b4 CODE 0x12E760 GTALCS_US_0x20138c CODE 0x12E7E0 GTALCS_US_0x2018ec CODE 0x12E8B0 GTALCS_US_0x201ae8 CODE 0x12E970 GTALCS_US_0x2021bc CODE 0x12EA30 GTALCS_US_0x2023c8 CODE 0x12EAE0 GTALCS_US_0x2025c4 CODE 0x12EB90 GTALCS_US_0x202770 CODE 0x12EC50 GTALCS_US_0x202b3c CODE 0x12ED10 GTALCS_EU_0x201494 CODE 0x12EDD0 GTALCS_EU_0x2019f4 CODE 0x12EEA0 GTALCS_EU_0x201bf0 CODE 0x12EF60 GTALCS_EU_0x2022c4 CODE 0x12F020 GTALCS_EU_0x2024d0 CODE 0x12F0D0 GTALCS_EU_0x2026cc CODE 0x12F180 GTALCS_EU_0x202878 CODE 0x12F240 GTALCS_EU_0x202c44 CODE 0x12F300 GTALCS_JP_0x21e0d4 CODE 0x12F3C0 GTALCS_JP_0x21e634 CODE 0x12F490 GTALCS_JP_0x21e830 CODE 0x12F550 GTALCS_JP_0x21ef04 CODE 0x12F610 GTALCS_JP_0x21f110 CODE 0x12F6C0 GTALCS_JP_0x21f30c CODE 0x12F770 GTALCS_JP_0x21f4b8 CODE 0x12F830 GTALCS_JP_0x21f884 CODE 0x12F8F0 GTALCS_US_0x22dd8c CODE 0x12F9B0 GTALCS_US_0x22ddd0 CODE 0x12FCD0 GTALCS_US_0x22e034 CODE 0x12FD50 GTALCS_US_0x22e078 CODE 0x12FE30 GTALCS_EU_0x22de8c CODE 0x12FEB0 GTALCS_EU_0x22ded0 CODE 0x12FF30 GTALCS_EU_0x22e178 CODE 0x12FFB0 GTALCS_JP_0x31ad3c CODE 0x130030 GTALCS_JP_0x31ad80 CODE 0x1300B0 GTALCS_JP_0x31b028 CODE 0x130130 GTAVCS_US_0x23e5ac CODE 0x1301B0 GTAVCS_US_0x23f440 CODE 0x130230 GTAVCS_US_0x23f558 CODE 0x1302B0 GTAVCS_US_0x23f8e0 CODE 0x130330 GTAVCS_US_0x23fa80 CODE 0x1303B0 GTAVCS_US_0x23ffb8 CODE 0x130430 GTAVCS_US_0x2f1d64 CODE 0x1304B0 GTAVCS_US_0x280bbc CODE 0x130530 GTAVCS_US_0x280c04 CODE 0x130610 GTAVCS_US_0x280894 CODE 0x130690 GTAVCS_US_0x2808e8 CODE 0x130710 MaxPayne2_assignSubDot CODE 0x130800 MaxPayne2_sceVu0MulMatrix3x4Const CODE 0x130D80 MaxPayne2_setTransformedPos CODE 0x132640 MaxPayne2_US_506940 CODE 0x132E50 MaxPayne2_US_506984 CODE 0x133460 sce_waitIpuIdle_hook CODE 0x133B10 sce_waitIpuIdle64_loop CODE 0x133E70 sce_waitIpuIdle64_top CODE 0x134300 sceMpeg_ri0_000 CODE 0x1351A0 sceMpeg_copyAddRefImage CODE 0x136B10
Example of one entry in emu.
SCE_RELRO:000000000021A280 stru_21A280 db 'SLES-53830',0 ; game_id ; "Psychonauts_compareFunction_EMeshFrag" SCE_RELRO:000000000021A280 db 0 SCE_RELRO:000000000021A280 dd 18A498h ; hook_start_pc SCE_RELRO:000000000021A280 dd 0 ; unk SCE_RELRO:000000000021A280 dd 18A504h ; hook_end_pc SCE_RELRO:000000000021A280 dd 0A40B81CBh ; hash SCE_RELRO:000000000021A280 dd 0 ; align1 SCE_RELRO:000000000021A280 dq offset Psychonauts_compareFunction_EMeshFrag; fnc_ptr SCE_RELRO:000000000021A280 dq 0 ; align2 SCE_RELRO:000000000021A280 dq offset aPsychonautsCom; hook_name
Same goes for "kernel" injections, they are also based on ID + Hash + address. Generally all "injections" should be safe to be enabled by configs. There is really small chance for hash/address(and id) collision. Not to be confused with "native" / "native-patch" !
RESEARCH TO DO
| Name | Notes |
|---|---|
| 4-Player Multitap in urban reign | Weird why it isn't working. |
| Locating the gs registers | Never gonna happen it seems. |
| Fully understanding the hook functions | |
| Trying to reverse-engineer any eboot to improve compatibility | |
| Locating the proper CDVD read speed (God of war and Ratchet size matters [Both have affected music]) | IOP and CDVD commands help |
| Fully understand what the vif chunk command thingy does | Too low and your game will freeze at the intro |
| Find the the most GIF accurate emulator there is. | Kof98?? |
| Find out what some of the gs commands do and edit their description | |
| Implement a EE memory patch for ratchet up your arsenal (Not trivial obviously) | |
| Fix the two tenchu and harry potter games (eughhh) |