Editing Talk:PSP Emulation

= Notes =

* No keys available in emu, so everything is loaded decrypted from ISO
* BOOT.BIN is the loaded executable from ISO
* 3 psp remasters (1 is below 4.55, 2 others above 4.55 but below 5.05)
* size of patapon is 574MB, size of locoroco 2 is 3.3GB


* Crashing near sceGeListEnQueue means low vram??

= Patches =

<source lang="lua">
local gpr		= require( "ax-gpr-alias" ) -- you can access Allegrex GPR by alias (gpr.a0 / gpr["a0"])
local pad		= require( "pad" ) -- pad state
local emuObj		= getEmuObject() -- emulator
local axObj		= getAXObject() -- allegrex

-- Fixup additional songs path
local addOnPathHook = function()
	local pathPtr = axObj.GetGpr(gpr.a2)
	axObj.WriteMemStrZ(pathPtr, "ao0:/MUSIC/") -- reroute to add-on directory
end

axObj.AddHook(0x88c022c, 0x24c66de0, addOnPathHook)
...
</source>

reroutes sceIoOpen "ms0:/PSP/SAVEDATA/UCUS98702MUSIC/" to "ao0:/MUSIC/"

axObj.AddHook(0x8800000 (base) + offset in psp boot.bin, original bytes little endian, hook_function)

=CLI settings available in Echodrome emu=
Not all, just interesting ones. 
<br>Settings without variable are just on/off /true/false/ 0/1.
*'''--forcenobilinear''' Possibly required for Persona 3, and few more

*'''--antialias'''
**msaa4x
**ssaa4x

*'''--texcachemode''' for issues with texture cache (modes lower than full possibly read some textures directly without cache).
**drawboundsloco
**patchworkheroes
**locoroco2
**rondo (Castlevania: The Dracula X Chronicles?)
**full

*'''--smoothlevel''' (unknown max level)
*'''--anisolevel''' (unknown max level)

*'''--present''' set when frame is presented. Sync issues, flickering screen, tearing, input lag, etc.
**vblankstart
**setframebuf
**drawsync

*'''--vramcopyback''' for games that download data from GPU to Allegrex
*'''--gputhread''' possibly move GPU emulation to another thread, speedhack but can decrease compatibility.

*'''--xobuttonmode''' self explaining
**oenter
**ocancel

'''Additionally emulator check for title IDs:
'''
*NPUG80325 GOW Chains of Olympus
*NPEG00023 GOW Chains of Olympus
*NPHG00027 GOW Chains of Olympus
*NPUG80508 GOW Ghost of Sparta
*UCUS98617 Gangs of London
*UCES00113 Gangs of London
And do something when ID match, for now is unknown what exactly.