Cheat Engine

liledition · Cheater Reputation: 0 Joined: 12 Sep 2014 Posts: 49

Hello

How do I identify right opcode for AA script? There are always more then one and they look all very similar... Can anyone give me some hint ont this?

Example:

Geri · Moderator Reputation: 111 Joined: 05 Feb 2010 Posts: 5627

Check all of them to see if any of those codes are accessing to your health only.

aikoncwd · Posted: Tue Feb 10, 2015 10:41 am Post subject:

Use this option:

This will show if an opcode is accessing more than 1 address at same time. Then pick the opcode with (1) access. If every opcode is accessing more than 1 address (shared code) then press "More Information" and use that info (registers or StackView) to dissect and determine the correct address

Smile

liledition · Cheater Reputation: 0 Joined: 12 Sep 2014 Posts: 49

Well here

All of them access only health address...

Geri · Moderator Reputation: 111 Joined: 05 Feb 2010 Posts: 5627

Then just pick one that you like.

liledition · Cheater Reputation: 0 Joined: 12 Sep 2014 Posts: 49

And can u tell me what is wrong with this script?

Geri · Moderator Reputation: 111 Joined: 05 Feb 2010 Posts: 5627

Yes, you have used wrong instructions and value type. Your value is double and you are using instructions for integers instead.

Since you are clearly not familiar with handling double values at the moment, I recommend to just force a static value instead of trying to go for the max HP (in other words, freeze the value to some fix amount).
You can do that with mov instructions and it will work, just don't forget that you have to modify 8 bytes, not only 4.

If you insist on doing it the hard way, you have to use instructions for float values and if toughness is an integer, you also have to convert it to double.

Or you can find an address where max HP is stored and copy the max HP to the current HP, which is also possible with mov instructions.

liledition · Cheater Reputation: 0 Joined: 12 Sep 2014 Posts: 49

Geri · Moderator Reputation: 111 Joined: 05 Feb 2010 Posts: 5627

If health will not jump back to some max HP value, then why don't you just change health to a really high amount instead of freezing it? Then you wouldn't run out of health and you don't have to freeze it.

As for float instructions, they work differently from the ones that you have used for integers.

fld will load the first value (eg toughness). Then you can use fadd to add a certain amount to it. Keep it in mind that you have to add float value to a float value, not integer and that float instructions will not accept a number as parameter, so you have to store (double)65 on an address.

When you are done, use fstp to store the value where you want it to be (eg store it on the health address).
You also have to use qword instead of dword, because your value is double.

liledition · Cheater Reputation: 0 Joined: 12 Sep 2014 Posts: 49

Geri · Moderator Reputation: 111 Joined: 05 Feb 2010 Posts: 5627

aikoncwd · Posted: Tue Feb 10, 2015 6:50 pm Post subject:

Hey, read this:

http://forum.cheatengine.org/viewtopic.php?p=5572126

Your original opcode is doing this:

liledition · Cheater Reputation: 0 Joined: 12 Sep 2014 Posts: 49

aikoncwd · Posted: Tue Feb 10, 2015 7:54 pm Post subject:

The script works, you only need to use dq or dd in your example.

Try another thing... look some opcodes above and find where mm0 get the value, imagine this:

Geri · Moderator Reputation: 111 Joined: 05 Feb 2010 Posts: 5627

Be more specific. What didn't work and what happens exactly?
You should also try code injection on some other codes, maybe this one is not working after all.