Cheat Engine

[DiamondPhoenix]

My goal is to find out how levels are built, in a very old windows XP / 89 game. It is just a grid, and after some time, i was able to find a non-static location. If if change a value for the top-left tile of the first level for example, the game does change what tile is loaded the next time it loads that level.

So i need to find out where those values come from, either from the EXE itself, or an external file, like a .pak file for example, and what address from that file.

The problem is, it changes only once, on startup. I cannot use "Find out what accesses this address" for this.
The data IS copied at least twice in two different areas, which are static, but i can only change the level if i change the EAX value as i keep pressing the "Step Into" button in the debugger.

I do expect the level to be compressed in some way in the file.

At the moment, my only to consistently find where the level data is in the memory, is by doing a write breakpoint on the first tile of the first level, and then copy the ESI value, and go to that address in the memory viewer.