Cheat Engine

kik4444 · Last edited by kik4444 on Mon Dec 22, 2014 3:49 pm; edited 1 time in total

So this is the 1st time I've attempted to create my own teleport script for a simple 2D game. I've used previous teleport script discussions as a reference, but I can't figure out what's wrong. Basically when I try to finish the code, it says that many labels are not defined in the script while they ARE in there. I'll post my script and my whole cheat table.

Dark Byte · Posted: Mon Dec 22, 2014 3:48 pm Post subject:

you have not defined savex, savey, saveco and loadco

instead of defining them as labels you may want to define them as allocs

e.g:
instead of

kik4444 · Posted: Mon Dec 22, 2014 4:32 pm Post subject:

Thx, that solved the label defining problem, but my script doesn't work, are there any problems with it? here's the new one

Dark Byte · Posted: Mon Dec 22, 2014 4:50 pm Post subject:

fstp dword ptr [ebx+00000414] will override your new value in [ebx+00000414]

and it's likely that the code after that also restores [ebx+418]

You may wish to pop that value from the fpu stack and jump to after the original code
Or change the value in the fpu stack instead (don't ask me, I never use the ancient fpu instruction set)

Or try finding a better code injection point (e.g AFTER it has been set )

kik4444 · Posted: Mon Dec 22, 2014 4:53 pm Post subject:

Here's the code I just re-wrote

Dark Byte · Posted: Mon Dec 22, 2014 4:56 pm Post subject:

your load is still going to execute "fstp dword ptr [ebx+00000414] "

easiest is to find a different code injection spot.
Find out where "fstp dword ptr [ebx+00000418]" is and do a code injection right after that line

kik4444 · Posted: Mon Dec 22, 2014 5:08 pm Post subject:

Ok, happy to report that my code finally works, turns out I had made a mistake in the beginning that I didn't notice, basically I was comparing if my saveco & loadco were 0 and THEN I was jumping to the saving and loading, and not when they were 1. Anyways, here's my new working code. Is there anything unnecessary in there?
Although in this type of game, being able to save and load your position doesn't do much, since it's in small rooms and if you attempt to load a saved position in another room, the game crashes, but I only intended all of this for practicing my teleport scripts and actually being able to teleport in a previous spot in the same room in this game has no practical use.

Dark Byte · Posted: Mon Dec 22, 2014 5:25 pm Post subject:

Now the original code is never called when both save and load are 0

In this case, the original code is safe as it doesn't overwrite your new data