Cheat Engine

penchops2 · How do I cheat? Reputation: 0 Joined: 10 Sep 2022 Posts: 3

I'm trying to figure out how to fix this game on steamdeck.

Problem: Lights are slowing down the emulation. There's a fix that mostly fixes this in PCSX2 but it's not perfect so you get lights turned on all the time, transparencies and some 30fps slowdowns.

I have been doing CheatEngine tutorials and I managed to disable car lights and rear mirror. Which improved a lot the experience.

I want to remove also things like Sun and other lights.

What I've tried:

- I've loaded Seatle race reverse on arcade time trial (other cars also toggles it) , there you have the sun just starting the race. Sun toggles with address: 21BE9168. values: 1 or 0 and it never changes when restarted game.
- Try setting this one to 0 from .pnach with this code:
patch=1,EE,21BE9168,extended,3C013F80
- It doesn't worked, so I supposed that's not the real toggle... But it is. I've checked what accessed the address and yep. If you replace one of the mov [ecx],edx with "nop" it will toggle off.

How can I manage to set this nop on cheat enine by address?

Thank you very much! Smile

cooleko · Posted: Sat Sep 10, 2022 12:23 pm Post subject:

It sounds like this is what you want to use:

https://wiki.cheatengine.org/index.php?title=Cheat_Engine:Auto_Assembler#Example_using_DEFINE
https://wiki.cheatengine.org/index.php?title=Auto_Assembler:registerSymbol#Examples

My brain isn't turned on yet so I may have missed the point of your post, but this lets you change the code at a specific location in memory which sounds like what you were trying to do.

Otherwise, is there a reason that an AOB scan wont work?

penchops2 · How do I cheat? Reputation: 0 Joined: 10 Sep 2022 Posts: 3

the TLDR;

adress that turns on the sun is 21BE9168
the adress that changes it makes:
mov [ecx],edx

turning this to nop works, making aob script works, but I need .pnach, so wrinting it by address it's what I need.

EDIT: i don't know how to put some images here... but here's reddit post with some images:
/r/cheatengine/comments/xaxn0g/help_gran_turismo_4/

cooleko · Posted: Sat Sep 10, 2022 2:05 pm Post subject:

I don't know anything about pnatch, from googling it, it seems the last 4 bytes are the code to be written to the address, if you want to replace that with nop then you have to consider that mov [rcx],edx is only two bytes (Word) and you are replacing 89 11 with 90 90

Why dont you try:

patch=1,EE,21BE9168,word,9090

And this is just a guess, I have no idea what I'm talking about.

penchops2 · How do I cheat? Reputation: 0 Joined: 10 Sep 2022 Posts: 3

Nothing works and give up is starting to being an option. I will be waiting till, maybe, someone knows how to do these things.

cooleko · Posted: Sat Sep 10, 2022 7:29 pm Post subject: