Cheat Engine

[Gear2ndGandalf]

This address executes when an enemy hits player, and the damage output varies by enemy type and action. Instead of mov r8d,#1, where all enemies do 1 damage to the player, I want to divide the general damgae done by 2 as to keep in line with the variable damage output from a variety of enemies and attacks.

Google searched up and down just to find examples regarding eax, ah, bl, ebx, ax, bx. Though I fail to implement the code properly and keep crashing the game as an enemy attack lands.

Please view photo for code.

[ParkourPenguin]

https://www.felixcloutier.com/x86/div

The numerator is always rdx:rax (rdx is the more significant half; edx:eax for 32-bit div). The denominator is some generic register or memory location- you're free to use whatever you want (probably not edx / eax obviously).

If you're dividing by 2, just shift the bits to the right by 1:

[Dark Byte]

you don't need to use floats if you don't want to use floats

you can also multiply the value by 10 and then divide by 15 (divisor * 10) to get a divide by 1.5 with decent accuracy

(10 is just for accuracy. you can also multiply by 2 and then divide by 3(divisor * 2) depending on how accurate the input is)

[Gear2ndGandalf]

Thanks that code actually works! And thanks for the explanation as well.

[Gear2ndGandalf]

@ParkourPenguin

I have another one I'm struggling with.

Dante only goes into Majin Form devil trigger when his base HP is below 350. Starting max HP is 5000; Upgradable to 20000. I want to write a script that will allow us to set a percentage of Max HP needed to trigger the Majin Form.

Original code is:

[ParkourPenguin]

`div` is for integers. If you want floating point arithmetic, use SSE instructions.

Push `rcx`, not `ecx`. There might be something important in the upper 32 bits (e.g. a 64-bit pointer).

You don't need to allocate a full page (4096 bytes) of memory for a single variable.

There's no good reason to use floats instead of doubles.

Why move 100 into edx before the `div`? edx is the upper 32 bits of the numerator.
After `div`, eax is the result and edx is the remainder (i.e. modulus operation). You want eax and not edx.

I'm guessing the user input should be a number between 0 and 100. Floating point arithmetic:

[Gear2ndGandalf]

Really appreciate it! Thanks for all your help ParkourPenguin and Dark Byte! Now I'm going to open another topic with a CE question regarding how to make a pop up warning happen when enabling a script.