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

Patches

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)
...

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

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